An image reading apparatus comprising: a support section in contact with a mounting surface on which the apparatus is mounted; an apparatus body including a reader configured to read a document, the apparatus body being configured to be turnable with respect to the support section for position change; a position holding section (8, 29a-c) for holding a position of the apparatus body with respect to the support section; a pair of transport rollers disposed upstream of the reader in a straight document transport path on which a document is transported, the pair of transport rollers being configured to transport the document downstream; a feed roller disposed upstream of the pair of transport rollers in the document transport path, the feed roller being configured to feed the document downstream; a pair of discharge rollers disposed downstream of the reader, the pair of discharge rollers being configured to discharge the document; and a first motor that is a drive source for at least one of the pair of transport rollers and the pair of discharge rollers, wherein the apparatus body is configured to be switched between a first position in which the apparatus body is not configured to read the document using the reader and a second position in which the apparatus body is configured to read the document using the reader, the second position turned from the first position, the center of gravity (G1, G2) of the apparatus body is lower than or equal to a rotation axis center of the apparatus body in a vertical direction viewed in a rotation axis direction of the apparatus body when the apparatus body is in the first position or in the second position, the apparatus body is configured to be switched to a third position in which the apparatus body is configured to read the document using the reader and in which the apparatus body is turned from the second position, the center of gravity of the apparatus body is lower than the rotation axis center of the apparatus body in the vertical direction viewed in the rotation axis direction of the apparatus body when the apparatus body is in the third position, and a drive shaft of the first motor is lower than the rotation axis center of the apparatus body in the vertical direction viewed in the rotation axis direction of the apparatus body when the apparatus body is in the first position, in the second position, or in the third position. a support section in contact with a mounting surface on which the apparatus is mounted; an apparatus body including a reader configured to read a document, the apparatus body being configured to be turnable with respect to the support section for position change; a position holding section (8, 29a-c) for holding a position of the apparatus body with respect to the support section; a pair of transport rollers disposed upstream of the reader in a straight document transport path on which a document is transported, the pair of transport rollers being configured to transport the document downstream; a feed roller disposed upstream of the pair of transport rollers in the document transport path, the feed roller being configured to feed the document downstream; a pair of discharge rollers disposed downstream of the reader, the pair of discharge rollers being configured to discharge the document; and a first motor that is a drive source for at least one of the pair of transport rollers and the pair of discharge rollers, wherein the apparatus body is configured to be switched between a first position in which the apparatus body is not configured to read the document using the reader and a second position in which the apparatus body is configured to read the document using the reader, the second position turned from the first position, the center of gravity (G1, G2) of the apparatus body is lower than or equal to a rotation axis center of the apparatus body in a vertical direction viewed in a rotation axis direction of the apparatus body when the apparatus body is in the first position or in the second position, the apparatus body is configured to be switched to a third position in which the apparatus body is configured to read the document using the reader and in which the apparatus body is turned from the second position, the center of gravity of the apparatus body is lower than the rotation axis center of the apparatus body in the vertical direction viewed in the rotation axis direction of the apparatus body when the apparatus body is in the third position, and a drive shaft of the first motor is lower than the rotation axis center of the apparatus body in the vertical direction viewed in the rotation axis direction of the apparatus body when the apparatus body is in the first position, in the second position, or in the third position.