Medium feed device and image reading apparatus

A medium feed device comprising:

• a feed roller that is provided to a device body and that feeds a medium;
• a separator roller that is provided at a position on the device body facing the feed unit and that separates the medium, wherein the feed roller and the separator roller are adjacent to each other such that medium is nipped between the feed roller and the separator roller when being separated by the separator roller;
• and
• a medium support section that supports the medium in an inclined state upstream of the feed unit,
• wherein the medium support section is configured with a variable contact angle between the medium supported by the medium support section and the separator unit, and includes at least one rotatable auxiliary roller that contacts at least part of the medium and that is provided on a face supporting the medium,
• wherein the device body is configured including a lower unit and an upper unit, the upper unit is attached to the lower unit so as to be capable of swinging with a paper transport direction downstream side of the lower unit acting as a swing point, and
• wherein the medium support section is configured to switch an inclination angle of the medium support section providing an engagement protrusion on a swing shaft of the medium support section, providing plural engagement indentations on the lower unit, and switching the engagement indentation the engagement protrusion of the swing shaft engages with.