Travis Barker -- I Got My Band's Logo Tattooed ON MY HEAD!!!

Should you ever forget Blink-182 drummer Travis Barker is ALSO a member of the Transplants, just take a look at his head -- because TB just finished tattooing their logo onto his melon.

Barker recently put the final touches on his head piece ... work that was done by one of the more famous tattoo artists around, Mister Cartoon.

Travis clearly feels pretty committed to the punk rock/rap group these days ... even though it's really just a side project for all its members ... and word is they have a new album coming out soon.