To improve precision in collation processes or create a database of collation images by registering at least a part of captured images not matching a previously registered face image, as a collation face image, a face collation apparatus includes an image acquirer that acquires captured face images captured by a capturing device, a registered-person image storage that stores registered-person images that are previously registered face images, an image collator that collates the captured images with the registered-person images, an unregistered-person image storage that stores the captured images that do not match the registered-person images, an image output that outputs at least one of the unregistered-person images stored in the unregistered-person image storage to a display device, and an image register, selected to be registered by a user, that registers the unregistered-person image, among the unregistered-person images output to the display device, as a registered-person image in the registered-person image storage.