An image reader comprising: a conveyor (45, 46, 47, 48, 49, 50, 51, 76) configured to convey documents one-by-one successively in a U-turn path formed by a curved guide surface; a reading unit configured to read an image on the document conveyed by the conveyor (45, 46, 47, 48, 49, 50, 51, 76); a contact glass that is disposed between the reading unit and the document conveyed by the conveyor (45, 46, 47, 48, 49, 50, 51, 76); a cover configured to cover the conveyor (45, 46, 47, 48, 49, 50, 51, 76), the cover including a first surface and a second surface, the first surface located on an upper side of the reading unit and the contact glass, and the second surface extending in a direction such that a plane of the second surface crosses planes of both the contact glass and the first surface; and a guide surface located between the conveyor (45, 46, 47, 48, 49, 50, 51, 76) and a discharge port, the guide surface configured to support the document when being discharged through the discharge port, wherein: the conveyor (45, 46, 47, 48, 49, 50, 51, 76) comprises a convey roller that is disposed between the reading unit and the discharge port and that conveys the document from which the image was read by the reading unit toward the discharge port, the second surface extends in parallel to a roller axis of rotation of the convey roller, the convey roller is located above a plane of the contact glass configured to support the document, and a portion of the convey roller extends below the plane of the contact glass, characterized in that the second surface further includes a movable member configured to be movable between an open position for opening a discharge port, through which the document conveyed by the conveyor (45, 46, 47, 48, 49, 50, 51, 76) is to be discharged above the movable member, and a closed position for closing the discharge port, and an angle between an extension plane extended along the contact glass and a straight line interconnecting a point of contact of the convey roller with the document and a tip of the movable member located in the open position is not less than 30 degrees. a conveyor (45, 46, 47, 48, 49, 50, 51, 76) configured to convey documents one-by-one successively in a U-turn path formed by a curved guide surface; a reading unit configured to read an image on the document conveyed by the conveyor (45, 46, 47, 48, 49, 50, 51, 76); a contact glass that is disposed between the reading unit and the document conveyed by the conveyor (45, 46, 47, 48, 49, 50, 51, 76); a cover configured to cover the conveyor (45, 46, 47, 48, 49, 50, 51, 76), the cover including a first surface and a second surface, the first surface located on an upper side of the reading unit and the contact glass, and the second surface extending in a direction such that a plane of the second surface crosses planes of both the contact glass and the first surface; and a guide surface located between the conveyor (45, 46, 47, 48, 49, 50, 51, 76) and a discharge port, the guide surface configured to support the document when being discharged through the discharge port, wherein: the conveyor (45, 46, 47, 48, 49, 50, 51, 76) comprises a convey roller that is disposed between the reading unit and the discharge port and that conveys the document from which the image was read by the reading unit toward the discharge port, the second surface extends in parallel to a roller axis of rotation of the convey roller, the convey roller is located above a plane of the contact glass configured to support the document, and a portion of the convey roller extends below the plane of the contact glass, the conveyor (45, 46, 47, 48, 49, 50, 51, 76) comprises a convey roller that is disposed between the reading unit and the discharge port and that conveys the document from which the image was read by the reading unit toward the discharge port, the second surface extends in parallel to a roller axis of rotation of the convey roller, the convey roller is located above a plane of the contact glass configured to support the document, and a portion of the convey roller extends below the plane of the contact glass, characterized in that the second surface further includes a movable member configured to be movable between an open position for opening a discharge port, through which the document conveyed by the conveyor (45, 46, 47, 48, 49, 50, 51, 76) is to be discharged above the movable member, and a closed position for closing the discharge port, and an angle between an extension plane extended along the contact glass and a straight line interconnecting a point of contact of the convey roller with the document and a tip of the movable member located in the open position is not less than 30 degrees.