KAIBUTSU-KUN ORIGINAL SOUND TRACK
| Composed by | Akio Izutsu |
| Arranged by | Akio Izutsu |
| Published by | Vap |
| Catalog number | VPCD-81670 |
| Release type | Game Soundtrack - Official Release |
| Format | 1 CD - 25 tracks |
| Release date | May 26, 2010 |
| Duration | 01:16:24 |
| Genres |
| 1 | 怪物くん | 05:20 | |
| 2 | 愉快、痛快、奇々怪々!! | 03:11 | |
| 3 | 怪物ランド | 03:05 | |
| 4 | デモキン、蘇り | 03:00 | |
| 5 | ゆかいな怪物屋敷 | 02:17 | |
| 6 | 悪魔の招待状 | 03:20 | |
| 7 | 怪物王子 | 05:25 | |
| 8 | 陰の主 | 02:18 | |
| 9 | デビランド | 03:24 | |
| 10 | お供の3匹 | 02:37 | |
| 11 | みんなの時間 | 03:00 | |
| 12 | 欲望の人間界 | 02:33 | |
| 13 | すてきな人間界 | 02:31 | |
| 14 | 人間界で大暴れ | 01:58 | |
| 15 | デモリーナ | 03:07 | |
| 16 | ともだちだろ? | 03:27 | |
| 17 | フルハウス | 02:24 | |
| 18 | アックマーの誘い | 02:49 | |
| 19 | 念力!! | 01:53 | |
| 20 | きみがいなくちゃ | 03:16 | |
| 21 | 悪魔界の陰謀 | 03:57 | |
| 22 | 帽子に誓って... | 03:27 | |
| 23 | うるさ～い!! | 03:01 | |
| 24 | 大いなる力、魔王石 | 01:39 | |
| 25 | 怪物大王の願い | 03:25 |
