An image reading apparatus includes a carrying unit that carries an irradiated object having a reflecting portion and a transmitting portion in a carrying direction, a first light source arranged on one face side of the irradiated object that irradiates light to an irradiated portion in a path of carrying the irradiated object, a second light source arranged on other face side that irradiates light to the irradiated portion, a detecting unit arranged to be spaced apart from the irradiated portion by a predetermined distance that detects the transmitting portion, a lighting control unit that controls to put on the second light source during a time period of passing the transmitting portion through the irradiated portion, a lens array arranged on one face side of the irradiated object that converges reflecting light reflected by the reflecting portion and transmitting light, and a sensor that receives converged light.