Image reading apparatus

An image reading apparatus comprising:

• a reading section configured to read a medium being transported;
• feeding means configured to feed the medium toward the reading section;
• and
• a medium detection section provided along a medium transport path between the feeding means and the reading section and configured to include a transmitting portion configured to emit an ultrasonic wave and a receiving portion configured to receive the ultrasonic wave emitted from the transmitting portion, and output an output value equivalent to a magnitude of the received ultrasonic wave,
• wherein, in a case where the output value of the receiving portion satisfies a first condition, a transport of the medium is continued,
• wherein, in a case where the output value of the receiving portion satisfies either a second condition different from the first condition or a third condition different from the second condition, the transport of the medium is brought to a halt,
• wherein a lower limit value and an upper limit value are set in accordance with a kind of the medium,
• wherein the first condition is satisfied in a case where the output value falls within a reference range prescribed by the lower limit value and the upper limit value,
• wherein the second condition is satisfied in a case where the output value is lower than the lower limit value,
• wherein the third condition is satisfied in a case where the output value is higher than the upper limit value,
• wherein the receiving portion is disposed in a concave portion provided on a side of one transport path face among a pair of transport path faces between which the medium being transported is interposed, and
• wherein the concave portion includes a medium scooping portion provided in such a way as to protrude from an opening of the concave portion toward an inside, and partially cover a downstream side portion of the receiving portion.