The invention relates to an optoelectronic sensor device (1) for a motor vehicle, for detecting objects located in the surroundings of the motor vehicle, having a transmitting unit (2) for emitting an optical transmission signal (5), having a receiving unit (7) for receiving a reception signal (8) which is the transmission signal (5) reflected by an object, wherein the receiving unit (7) has at least two receiving elements (9, 10, 11) which are arranged distributed along a distribution direction (12), and reception optics (13), in particular a receiving lens which is positioned ahead of the receiving elements (9, 10, 11) in the propagation direction (14) of the reception signal (8), having a securing device (22) for securing the receiving optics (13), and having a diaphragm (21, 21′) for reducing the intensity of the reception signal (8), wherein the diaphragm (21, 21′) is secured to the securing device (22).