An apparatus for image formation includes a slider, rotatable members, elastic members, and a waste toner box. The slider is supported by the main body of the apparatus and can reciprocate in the outward direction from the inside of the body to one side of the body and the inward direction opposite to the outward direction. The rotatable members are arranged in the outward and inward directions over the slider. Each of the elastic members biases one of the rotatable members upward relative to the slider. The rotatable members support the waste toner box, which has an inlet for connection to the bottom of the outlet. The box inlet is formed at the end of the waste toner box that is upstream in the outward direction. The elastic member most upstream of all the elastic members in the outward direction is the greatest in biasing force of all the elastic members.