A focus control method comprising: a focus control step of carrying out auto focusing control by sensing a plurality of images of an object while continuously moving a position of a focusing lens at a constant velocity and determining in-focus positions of each of autofocusing areas that are located at a plurality of positions, the auto focusing areas having different charge accumulation timings and equal charge accumulation period being provided on an image sensing element of a digital camera that senses the images of the object and is driven in a rolling shutter mode; characterized by comprising: a first acquisition step (S3-S8) of acquiring read times, each of which is a midpoint between a charge accumulation start time (Ts1, Ts2, Ts3) and a read completion time (Tel, Te2, Te3) of finishing reading accumulated charge as image signals from the each of the auto focusing areas; a second acquisition step of acquiring a focusing lens position (Pe) and a time (Te) at which the focusing lens position (Pe) is acquired; a position calculation step of determining focusing lens positions at the read times of the image signals of the respective auto focusing areas based on the read times of the respective auto focusing areas that are acquired in said first acquisition step, the focusing lens position and time that are acquired in said second acquisition step and the constant moving velocity of the focusing lens; an evaluation value calculation step of calculating evaluation values that represent degrees of focused states of the respective auto focusing areas based on the image signals of the respective auto focusing areas; and an in-focus position calculation step of calculating an in-focus position of the focusing lens based on the focusing lens positions that are determined in said position calculation step and the evaluation values of the respective auto focusing areas that are calculated in said evaluation value calculation step. a focus control step of carrying out auto focusing control by sensing a plurality of images of an object while continuously moving a position of a focusing lens at a constant velocity and determining in-focus positions of each of autofocusing areas that are located at a plurality of positions, the auto focusing areas having different charge accumulation timings and equal charge accumulation period being provided on an image sensing element of a digital camera that senses the images of the object and is driven in a rolling shutter mode; characterized by comprising: a first acquisition step (S3-S8) of acquiring read times, each of which is a midpoint between a charge accumulation start time (Ts1, Ts2, Ts3) and a read completion time (Tel, Te2, Te3) of finishing reading accumulated charge as image signals from the each of the auto focusing areas; a second acquisition step of acquiring a focusing lens position (Pe) and a time (Te) at which the focusing lens position (Pe) is acquired; a position calculation step of determining focusing lens positions at the read times of the image signals of the respective auto focusing areas based on the read times of the respective auto focusing areas that are acquired in said first acquisition step, the focusing lens position and time that are acquired in said second acquisition step and the constant moving velocity of the focusing lens; an evaluation value calculation step of calculating evaluation values that represent degrees of focused states of the respective auto focusing areas based on the image signals of the respective auto focusing areas; and an in-focus position calculation step of calculating an in-focus position of the focusing lens based on the focusing lens positions that are determined in said position calculation step and the evaluation values of the respective auto focusing areas that are calculated in said evaluation value calculation step. a first acquisition step (S3-S8) of acquiring read times, each of which is a midpoint between a charge accumulation start time (Ts1, Ts2, Ts3) and a read completion time (Tel, Te2, Te3) of finishing reading accumulated charge as image signals from the each of the auto focusing areas; a second acquisition step of acquiring a focusing lens position (Pe) and a time (Te) at which the focusing lens position (Pe) is acquired; a position calculation step of determining focusing lens positions at the read times of the image signals of the respective auto focusing areas based on the read times of the respective auto focusing areas that are acquired in said first acquisition step, the focusing lens position and time that are acquired in said second acquisition step and the constant moving velocity of the focusing lens; an evaluation value calculation step of calculating evaluation values that represent degrees of focused states of the respective auto focusing areas based on the image signals of the respective auto focusing areas; and an in-focus position calculation step of calculating an in-focus position of the focusing lens based on the focusing lens positions that are determined in said position calculation step and the evaluation values of the respective auto focusing areas that are calculated in said evaluation value calculation step.