Provided is an image pickup apparatus capable of reading out and outputting pixel data of a partial area of a rolling shutter type image sensor. The image pickup apparatus includes: a readout condition setter configured to set a readout condition from the image sensor; a charge time setter configured to set charge time of the image sensor; a controller configured to control charging of the image sensor and readout from the image sensor so as to achieve constant charge time irrespective of the readout condition; and an image signal output unit configured to output a pixel signal read out by the controller.