Image reading apparatus and original transporting method

An image reading apparatus comprising:

• a reading member that reads an image on an original;
• a first transport roller positioned upstream of the reading member in an original transport path through which the original is transported, the first transport roller applying sending force to the original;
• a second transport roller positioned downstream of the reading member in the original transport path through which the original is transported, the second transport roller applying sending force to the original;
• an original mount portion on which an original before feeding is mounted;
• a feed roller that sends the original mounted on the original mount portion towards the first transport roller;
• a separating roller that nips and separates a medium together with the feed roller;
• and
• a control member that controls the reading member, the first transport roller, and the second transport roller, wherein
• the control member is configured to execute a plurality of transporting modes,
• the plurality of transporting modes include a first transporting mode that changes original transportation velocity control between a first state, in which reading is performed while the original receives sending force from, among the first transport roller and the second transport roller, the first transport roller alone, and a second state, in which reading is performed while the original receives sending force from both the first transport roller and the second transport roller, and
• the first transporting mode includes a period in which a largest set velocity value in transporting the original while in the first state is set higher than a largest set velocity value in transporting the original while in the second state,
• wherein,
• the first transporting mode includes a period in which the largest set velocity value in transporting the original when preforming reading while the original receives a transport load from the separating roller is set lower than the largest set velocity value in transporting the original when performing reading while the original does not receive the transport load from the separating roller.