A large-size face is immediately detected from a subject image. An image processing circuit of an imaging device detects a human face from a subject image and performs AWB, AE, and AF. The image processing circuit has processing for detecting a relatively-large-size face, processing for detecting a relatively-medium-size face, and processing for detecting a relatively-small-size face. When detecting a face, the image processing circuit first repeats, a plurality of times, processing for detecting a relatively-large-size face and outputting a detection result; performs processing for detecting a relatively-medium-size face and outputting a detection result; repeats, a plurality of times, processing for detecting a relatively-large-size face and outputting a detection result; and subsequently performs processing for detecting a relatively-small-size face and outputting a detection result.