An image forming apparatus includes: a fixing apparatus having: a heating section and a pressing section that forms a fixing-nip portion by being in pressure contact with the heating section, wherein at least one of the heating section and the pressing section having: an endless fixing belt that is trained about a plurality of rollers, a pressure applying member that causes the fixing belt to be in pressure contact with a side of the fixing-nip portion from an inner circumferential surface thereof, and a lubricant supplying member that supplies lubricant to the inner circumferential surface of the fixing belt; and a supplying amount change section that changes a supplying amount of the lubricant by the lubricant supplying member based on an amount used coming from a part replacement of at least one of the fixing belt, the pressure applying member and the lubricant supplying member.