Image reading apparatus and image forming apparatus

An image reading apparatus for separating and conveying documents one by one from a bundle of documents, causing the document to pass through a reading position, and reading an image from the document,

• the image reading apparatus comprising:
• a reading translucent plate having a portion formed to be longer in a width direction than in a conveying direction of documents perpendicular to the width direction;
• a rotation member capable of rotating around a shaft and provided in a width direction to face an opposing surface which is opposed to the document on the reading translucent plate;
• and
• a rotation driver that rotates the rotation member,
• wherein in the rotation member, each of:
• a cleaning member that comes into contact with the opposing surface according to rotation of the rotation member;
• a white reference area for obtaining white reference of the image to be read;
• and
• an end portion detection area for detecting a width direction end portion of a document is formed partially with regard to a circumferential direction,
• the cleaning member and the end portion detection area are arranged adjacent to each other without the white reference area interposed therebetween with regard to the circumferential direction of the rotation member,
• the rotation driver is arranged so that the end portion detection area faces the opposing surface while the document is passing through the reading position, and
• the rotation member is rotated without going through a state in which the white reference area faces the opposing surface in a paper interval period from when a trailing edge of the document passes the reading position to when a leading edge of a subsequent document reaches the reading position, so that the cleaning member is once brought into contact with the opposing surface, and then the end portion detection area returns back to a state of facing the opposing surface.