Image capturing device, image capturing method, capable of improving trackability of focus position and focusing accuracy with respect to subject

Abstract

[Object] To improve both trackability of a focus position and focusing accuracy with respect to a subject. [Solution] An image capturing device includes: an imaging element having a light receiving surface including detection pixels that receive light passed through different regions of an exit pupil of an imaging optical system, and detect a phase difference between two images obtained by splitting the exit pupil; a first detection unit configured to execute at least any of first focus detection based on a phase detection autofocus (AF) method and second focus detection based on a contrast detection AF method; a focusing control unit configured to drive at least one optical member included in the imaging optical system toward a focusing position detected by the focus detection; and a second detection unit configured to detect a change in a subject image. In a case where a state in which a change amount of the subject image is less than a threshold continues for a predetermined period of time or more after the first focus detection, the first detection unit executes the first focus detection or the second focus detection.