Violent delinquent Oga encounters a baby one day, which crawls onto his back and immediately forms an attachment to him. Though he doesn't know it yet, this baby is named Kaiser de Emperana Beelzebub IV, or "Baby Beel" for short—the son of the Demon Lord!
 | Season 1 Episode 1 I Picked Up The Devil King Air Date: 2011-01-09 Duration: 22 min |
| Season 1 Episode 2 I Became a Gang Leader with a Child Air Date: 2011-01-16 Duration: 22 min |
| Season 1 Episode 3 Are There Any Strong, Ruthless Bastards Around Here? Air Date: 2011-01-23 Duration: 22 min |
| Season 1 Episode 4 There Is One Second Before the Demon Lord's Floods Burst Forth Air Date: 2011-01-30 Duration: 22 min |
| Season 1 Episode 5 There's Nothing You Can't Buy With Money Air Date: 2011-02-06 Duration: 22 min |
| Season 1 Episode 6 Toys Have Arrived from the Demon World / We Played Doctor Air Date: 2011-02-13 Duration: 22 min |
| Season 1 Episode 7 The Demon Lord makes his Debut at the Park Air Date: 2011-02-20 Duration: 22 min |
| Season 1 Episode 8 We Meet Again Air Date: 2011-02-27 Duration: 22 min |
| Season 1 Episode 9 Love is a Hurricane Air Date: 2011-03-06 Duration: 22 min |
| Season 1 Episode 10 A Disciple Was Gained Air Date: 2011-03-27 Duration: 22 min |
| Season 1 Episode 11 There Was Something Money Couldn't Buy Air Date: 2011-04-03 Duration: 22 min |
| Season 1 Episode 12 I Won't Let You Sleep Tonight Air Date: 2011-04-10 Duration: 22 min |
| Season 1 Episode 13 Baby Beel's Assessment Test / Hilda: Dear Great Demon Lord Air Date: 2011-04-17 Duration: 22 min |
| Season 1 Episode 14 Is There a Special Move? Air Date: 2011-04-24 Duration: 22 min |
| Season 1 Episode 15 The Delinquents Have Changed Into Swimsuits Air Date: 2011-05-01 Duration: 22 min |
| Season 1 Episode 16 You're Not a Bad Specimen of a Man Air Date: 2011-05-08 Duration: 22 min |
| Season 1 Episode 17 How About Some Demon World Homework? Air Date: 2011-05-15 Duration: 22 min |
| Season 1 Episode 18 I've Quit Being the BoB Brawler! Air Date: 2011-05-22 Duration: 22 min |
| Season 1 Episode 19 The Doctor Has Arrived Air Date: 2011-05-29 Duration: 22 min |
| Season 1 Episode 20 Everyone Assemble Air Date: 2011-06-05 Duration: 22 min |
| Season 1 Episode 21 Who Do You Think Is Ishiyama's Strongest? Air Date: 2011-06-12 Duration: 22 min |
| Season 1 Episode 22 Secluded Mountain Training Air Date: 2011-06-19 Duration: 22 min |
| Season 1 Episode 23 You Kidding Me? The Demon World Air Date: 2011-06-26 Duration: 22 min |
| Season 1 Episode 24 Welcome Back, Demon World! Air Date: 2011-07-03 Duration: 22 min |
| Season 1 Episode 25 The New Term Has Started Air Date: 2011-07-10 Duration: 22 min |
| Season 1 Episode 26 May I Call You Brother? Air Date: 2011-07-17 Duration: 22 min |
| Season 1 Episode 27 Called the Magical Girl Air Date: 2011-07-24 Duration: 22 min |
| Season 1 Episode 28 Let's All Get Physicals Air Date: 2011-07-31 Duration: 22 min |
| Season 1 Episode 29 What Are the 6 Holy Knights? Air Date: 2011-08-07 Duration: 22 min |
| Season 1 Episode 30 Who are the Six Holy Knights? Air Date: 2011-08-14 Duration: 22 min |
| Season 1 Episode 31 No Conclusion Was Reached! Air Date: 2011-08-28 Duration: 22 min |
| Season 1 Episode 32 What Has the Transfer Girl Done? Air Date: 2011-09-04 Duration: 22 min |
| Season 1 Episode 33 There Are Wounds in the Past Air Date: 2011-09-11 Duration: 22 min |
| Season 1 Episode 34 Maids Run Amok Air Date: 2011-09-18 Duration: 22 min |
| Season 1 Episode 35 Time for the Game to Begin! Air Date: 2011-09-25 Duration: 22 min |
| Season 1 Episode 36 Finally, the Deciding Battle! Air Date: 2011-10-02 Duration: 22 min |
| Season 1 Episode 37 That Man Was a Teacher! Air Date: 2011-10-09 Duration: 22 min |
| Season 1 Episode 38 The Sibling Rivalry Has Begun Air Date: 2011-10-15 Duration: 22 min |
| Season 1 Episode 39 His Brother Was a Crybaby Air Date: 2011-10-22 Duration: 22 min |
| Season 1 Episode 40 No Shirt, No Shoes, No Assassins Air Date: 2011-10-29 Duration: 22 min |
| Season 1 Episode 41 On the Brink! What'll We Do? Air Date: 2011-11-05 Duration: 22 min |
| Season 1 Episode 42 It's Time for Training! Air Date: 2011-11-12 Duration: 22 min |
| Season 1 Episode 43 Where Might My Brother Have Disappeared to? Air Date: 2011-11-20 Duration: 22 min |
| Season 1 Episode 44 I Must Become Stronger Air Date: 2011-11-27 Duration: 22 min |
| Season 1 Episode 45 Play Games at Most One Hour a Day Air Date: 2011-12-04 Duration: 22 min |
| Season 1 Episode 46 Super Burning Combination Air Date: 2011-12-11 Duration: 22 min |
| Season 1 Episode 47 Sorry to Have Kept You Waiting Air Date: 2011-12-18 Duration: 22 min |
| Season 1 Episode 48 I am the Parent! Air Date: 2011-12-25 Duration: 22 min |
| Season 1 Episode 49 Beelzebub's New Year's Special! Beelbeel Journey to the West! Air Date: 2012-01-08 Duration: 22 min |
| Season 1 Episode 50 Today I'm Different on the Inside Air Date: 2012-01-15 Duration: 22 min |
| Season 1 Episode 51 Komainu-sama is Watching You Air Date: 2012-01-22 Duration: 22 min |
| Season 1 Episode 52 And Then There Were No Delinquents Air Date: 2012-01-29 Duration: 22 min |
| Season 1 Episode 53 Baby Beel's First Conquest / Furuichi Falls in Love Air Date: 2012-02-05 Duration: 22 min |
| Season 1 Episode 54 Black Baby Beel Grows Up! Air Date: 2012-02-12 Duration: 22 min |
| Season 1 Episode 55 I Have Lost My Pompadour / The Great Demon Lord Has Come Air Date: 2012-02-19 Duration: 22 min |
| Season 1 Episode 56 Are You a Traitor? / Is This a Job for Men? Air Date: 2012-02-26 Duration: 22 min |
| Season 1 Episode 57 Won't You Eat a Manju? / Won't You Get in a Mixed Bath? Air Date: 2012-03-04 Duration: 22 min |
| Season 1 Episode 58 Akumano Academy is Open! Air Date: 2012-03-11 Duration: 22 min |
| Season 1 Episode 59 We're the Strongest! Air Date: 2012-03-18 Duration: 22 min |
| Season 1 Episode 60 I Won't Say Goodbye Air Date: 2012-03-25 Duration: 22 min |
| Directing | Nobuhiro Takamoto | Director |
