A digital signal processing unit 17 of a digital camera which includes a solid-state imaging element 5 having an imaging pixel cell 30 and a pair of focus detecting pixel cells 31R and 31L determines whether a captured image signal obtained by imaging by the imaging element 5 has a region affected by at least one of the flare and the ghost. And, when it is determined that there is the region, the digital signal processing unit 17 performs correction processing by signal interpolation using an output signal of imaging pixel cells around the focus detecting pixel cell included in the captured image signal on an output signal of all the focus detecting pixel cells included in the captured image signal.