CIGS-based heterostructures have been demonstrated to achieve superior high absorption and photovoltaic effects theoretically and experimentally, making them extremely attractive for realizing optoelectronic devices. However, the applications of CIGS are mainly focused on solar cells. In this work, lateral photovoltaic effect (LPE) is firstly observed in CIGS film with Glass/Mo/CIGS/CdS/ZnO/ITO structure, indicating its great potential application in position sensitive detectors (PSDs).