Bower has made 52 appearances for Warriors in all competitions since joining from Leicester Tigers in 2014.
Details of the length of the 26-year-old's new contract at Sixways have not been disclosed.
"He always gives everything he's got and I've been thoroughly impressed with his attitude and his performance," director of rugby Gary Gold said.
Worcester Warriors loose-head prop Ryan Bower has signed a new contract with the Premiership club.