A target tracking device (2) for a flight vehicle (10) is specified which has a position-sensitive photodiode (4) with at least two signal outputs (A.sub.1, A.sub.2, A.sub.3, A.sub.4) which are respectively connected to a readout electronics (6), a control unit (8) which is connected to both readout electronics (6), and an optical lens unit (12) for imaging an illuminated point (15) of an object scene (14) on the photodiode (4), the readout electronics (6) respectively having an integration element for integrating a signal of the photodiode (4).