An image heating apparatus configured to heat an image formed on a recording material, the image heating apparatus comprising: a power source switching member configured to switch the start and stop of the image heating apparatus, a film formed in a tubular shape and configured to rotate in contact with the recording material; a heater unit configured to be in contact with an inner surface of the film, the heater unit including a heater, and a heater support configured to support the heater in a longitudinal direction of the heater, wherein the heater is fixed to the heater support with an adhesive; a temperature detection member configured to detect the temperature of the heater; a pressing roller configured to be in contact with an outer surface of the film and to form a nip together with the heater unit through the film, the nip being for nipping and conveying the recording material; a pressing spring configured to press the heater toward the pressing roller through the heater support for forming the nip; a pressing member configured to press the heater toward the pressing roller in a direction in which the heater is peeled from the heater support; a pressing force adjustment mechanism configured to adjust the pressing force by the pressing spring; a jam detection unit configured to detect jamming of the recording material; and a control portion configured to control the pressing force adjustment mechanism; wherein the image heating apparatus has a normal power mode for heating the image, and a saving-power mode with a lower power consumption than the normal power mode, and wherein the control portion is configured to cause the pressing force adjustment mechanism to release or reduce the pressing force in a case when: the jam detection unit detects jamming; or the power source switching member deactivates the image heating apparatus; or the image heating apparatus transfers from the normal power mode to the saving-power mode; and the temperature detected by the temperature detection member is below a predetermined threshold. a power source switching member configured to switch the start and stop of the image heating apparatus, a film formed in a tubular shape and configured to rotate in contact with the recording material; a heater unit configured to be in contact with an inner surface of the film, the heater unit including a heater, and a heater support configured to support the heater in a longitudinal direction of the heater, wherein the heater is fixed to the heater support with an adhesive; a temperature detection member configured to detect the temperature of the heater; a pressing roller configured to be in contact with an outer surface of the film and to form a nip together with the heater unit through the film, the nip being for nipping and conveying the recording material; a pressing spring configured to press the heater toward the pressing roller through the heater support for forming the nip; a pressing member configured to press the heater toward the pressing roller in a direction in which the heater is peeled from the heater support; a pressing force adjustment mechanism configured to adjust the pressing force by the pressing spring; a jam detection unit configured to detect jamming of the recording material; and a control portion configured to control the pressing force adjustment mechanism; wherein the image heating apparatus has a normal power mode for heating the image, and a saving-power mode with a lower power consumption than the normal power mode, and wherein the control portion is configured to cause the pressing force adjustment mechanism to release or reduce the pressing force in a case when: the jam detection unit detects jamming; or the power source switching member deactivates the image heating apparatus; or the image heating apparatus transfers from the normal power mode to the saving-power mode; and the temperature detected by the temperature detection member is below a predetermined threshold. the jam detection unit detects jamming; or the power source switching member deactivates the image heating apparatus; or the image heating apparatus transfers from the normal power mode to the saving-power mode; and the temperature detected by the temperature detection member is below a predetermined threshold.