In a fixing device, a second rotary member disposed opposite a first rotary member forms a nip between the first rotary member and the second rotary member through which a recording medium bearing a toner image passes. A first separation member rotatively provided on a rotary shaft of the first rotary member separates the recording medium passing through the nip from the first rotary member. A rotation angle adjuster connected to the first separation member changes a rotation angle position of the first separation member.