In response to an input instruction to start a still image capturing operation when a moving image capturing operation is being performed, an imaging apparatus controls the still image capturing operation to record a still image file on a recording medium, interrupts the moving image capturing operation, generates a moving image in which an interframe-compressed image whose difference information is zero is inserted as at least one of images to be substituted for a moving image corresponding to a time period for which the moving image capturing operation is interrupted, and records the generated moving image on the recording medium.