Conveyance device that conveys sheets with different specifications

A conveyance device comprising:

• a supply tray that supplies a sheet;
• a body to which the sheet is supplied from the supply tray and that includes a first image reading portion;
• a linear conveyance path that is provided in the supply tray and the body;
• a folded conveyance path that branches to one side from the linear conveyance path;
• a first conveyance guide that is detachable from the body, includes a second image reading portion, and forms, when the first conveyance guide is attached to the body, a first straight path branching to other side from the linear conveyance path;
• and
• a second conveyance guide that is detachable from the body, does not include the second image reading portion, and forms, when the second conveyance guide is attached to the body, a second straight path branching to other side from the linear conveyance path, wherein
• the first image reading portion reads an image on one side of the sheet being conveyed through the linear conveyance path,
• the second image reading portion reads an image on the other side of the sheet being conveyed through the first straight path, and
• the first conveyance guide is attached to the body, in case that the sheet has images on both sides of the sheet, and the second conveyance guide is attached to the body, in case that the sheet has an image only on one side of the sheet.