A fixing device includes a heating member that heats a recording medium having an image while transporting the recording medium by rotating; a measuring member that measures a temperature of the heating member and includes a body member, and a cantilever member whose base end is fixed to the body member and whose free end is in contact with the heating member; and a supporting member that supports the measuring member and includes a contact portion, the contact portion being in contact with a base portion of the cantilever member.