An image pickup apparatus which can perform focusing control with high speed and high precision is disclosed. The image pickup apparatus comprises a focus detection unit that detects a focusing state of the image-taking lens by phase difference detection method using light from the image-taking lens, and an in-focus judgment unit judges whether the image-taking lens is in an in-focus state or not, based on a result of a detection of contrast of an object image that has been taken with an image pickup device. Correction information, for correcting focusing control information of the image-taking lens that has been obtained by using the focus detection unit, is obtained based on information indicating the in-focus state of the lens obtained by using the in-focus judgment unit.