Mike Ford will leave Bath at the end of the Premiership season after four years at The Rec.
The 50-year-old initially joined the club in 2012 as first-team coach and was promoted to head coach a year later.
During his three seasons in charge, Ford has come close to winning silverware with Bath, but found his side falter at crucial moments.
And the current campaign has not gone well for Bath, with the club sitting ninth in the Premiership and having been knocked out in the European Champions Cup.
"Over the four years Mike has been with the club, both he and the team under his guidance have achieved a huge amount," said managing director Tarquin McDonald.
"He has developed an exciting, attacking style of rugby, helped to develop exciting talent and in 2014-15 he brought the team to the final against Saracens at Twickenham.
"I would like to take this opportunity to thank Mike for all his hard work, passion and commitment to the club and wish him all the best for the future."