Image reading apparatus

An image reading apparatus for reading an image on a document, the image reading apparatus comprising:

• a light source configured to irradiate the document with light along a main scanning direction;
• an image sensor configured to receive light reflected from the document irradiated by the light source;
• a circuit board on which the image sensor is mounted;
• a flexible flat cable through which an image signal output from the image sensor is transmitted to a controller;
• a connector mounted on the circuit board, the flexible flat cable being inserted into the connector for electrically connecting the image sensor with the controller;
• a carriage configured to support the circuit board;
• and
• adhesive that is filled for fixing the circuit board on the carriage,
• wherein assuming that the main scanning direction is a first direction, that a thickness direction of the circuit board is a second direction, and that a direction orthogonal to the first direction and the second direction is a third direction, the connector is mounted on a side of an end portion of the circuit board in the first direction,
• wherein the flexible flat cable is inserted into the connector along the third direction, and
• wherein the adhesive is filled between a surface on the side of the end portion of the circuit board in the first direction and a wall portion of the carriage, the surface extending in the first direction and the second direction, the wall portion being opposed to the surface.