An image heating apparatus includes: an excitation coil; an image heating member for generating heat using a magnetic flux from the excitation coil to heat an image on a recording material; a magnetic core; image heating member; a core supporting member; magnetic core; a back-up member; a pressing member forming a nip between the back-up member and itself with the image heating member therebetween; a stay member; an apparatus side plate; a first positioning portion for determining a position of the stay member relative to one of the apparatus side plates; and a second positioning portion, provided at a central portion of the stay member, for determining a position of the core supporting member relative to the stay member.