The present invention relates to a device for detecting objects. The device comprises at least one microwave-frequency transmitter and one microwave-frequency receiver. The receiver makes a relative rotary movement about the transmitter, a signal being transmitted toward an individual for several positions of the receiver on the circle of relative rotation, the signals reflected by points of an object and received by the receiver at the positions being supplied to processing means in order to form a radar image. The receiver and the transmitter can be installed on a disk with a very low moment of inertia. The invention applies notably for the detection of weapons or explosives carried by persons.