Medium transport apparatus, image scanning apparatus and image processing apparatus

A medium transport apparatus, comprising:

• transport rollers configured to transport a medium in a discharge direction or in a drawing direction;
• a medium loaded member configured to accept a medium transported in the discharge direction by the transport rollers;
• a pushing member that includes a contacting member configured to contact with one end of the medium on the medium loaded member, and being slidable with respect to the medium loaded member;
• a driving member configured to drive the transport rollers and the pushing member;
• and
• a control member that controls the driving member,
• wherein the control member controls the driving member so that the pushing member slides in a first direction away from the transport rollers so as to position the pushing member distal to the transport rollers, when the transport rollers are rotating in a first rotation direction and in which the medium is transportable in the drawing direction, and the control be controls the driving member so that the pushing member slides in a second direction opposite to the first direction so as to position the pushing member proximal to the transport rollers, when the transport rollers are rotating in a second rotation direction opposite to the first rotation direction and in which the medium is transportable in the discharge direction.