To provide a fixing belt reliable about carrying character free from slippage, etc., and an image heating and fixing apparatus having satisfactory resolution of a color image in the image heating and fixing apparatus which heats, pressurizes and fixes an image through a nip part formed of a pair of fixing members at least one of which is formed like a belt.

A belt 1 to be used for heating and fixing an unfixed toner image is provided with at least an elastic layer 1b at a belt-like base body 1a. In the elastic layer 1b, the average thickness d1 of a paper-through site and the average thicknesses d2 and d3 of non paper-through sites at both of the ends of the belt meet d1<d2, d3. The image heating and fixing apparatus puts a material to be recorded which has the unfixed toner image formed and carrying thereon through the nip part formed by a pair of the fixing members at least one of which is formed like a belt to heat, pressurize and fix the unfixed toner image, the belt-like fixing member is the fixing belt 1.