Image heating apparatus with detachable unit urging external heating member to rotational body

An image heating apparatus including a first rotational body and a second rotational body which sandwich and convey a recording material so as to heat an image formed on the recording material and an external heating member which comes into pressurized contact with the first rotational body and heating the first rotational body from the outside, the image heating apparatus comprising:

• a frame body which supports the first rotational body;
• a unit including an urging member which urges the external heating member to the first rotational body, a holding member which holds the urging member, and a supporting member which slidably supports the holding member in the urging direction of the urging member;
• a fastening member which detachably fastens the unit to the frame body via the supporting member;
• and
• a release unit which alleviates the urging force of the urging member by sliding the holding member with respect to the supporting member.