Image forming apparatus having transfer belt configured to avoid image defects

An image forming apparatus includes a belt, image forming unit, first and second transfer rollers, feeding portion, stretching roller and urging member. Regarding (1) a contact point between (i) an outer common tangential line between the stretching and first transfer rollers and (ii) the first transfer roller and (2) an intersection point between (i) the outer common tangential line and (ii) a line perpendicular to the outer common tangential line and passing through a rotation center of the second transfer roller, the contact point is closer to the stretching roller than the intersection point is to the stretching roller and a distance between the contact and intersection points is 5% or more of a diameter of the first transfer roller. The urging member urges the belt from an inner belt surface at a position, close to a transfer portion, between the first transfer roller and the belt.