貘头兽属（学名：Tapinocephalus）是种大型草食性恐头兽类动物，生存于二叠纪中期。貘头兽的体型矮胖，特征是巨大的头颅骨顶部、短的口鼻部。貘头兽科被认为有物种间的用头互相碰撞的行为，可能为了争夺地盘或求偶。

貘头兽的化石包含头颅骨与颅后骨骼，被发现于南非卡鲁盆地的波弗特群（Beaufort Group）地层，来自于其中的貘头兽组合带，年代属于开匹坦期。

貘头兽的身长达3公尺长，重量大约是1.5到2公吨，是当时最大的动物之ㄧ。角头兽（Keratocephalus）与麝足兽是同时代的近亲，且可能具有类似的体型与习性。

Tapinocephalus ("humble head") is a genus of large herbivorous dinocephalian that lived during the Middle Permian Period. These stocky, barrel-bodied animals were characterised by a massive bony skull roof and short weak snout. It is thought that, like the rest of the members of its family, the animals engaged in head-butting intraspecific behavior, possibly for territory or mates.