To provide a crime prevention device which performs high crime prevention performance and brings an aesthetic sense of integrity which does not damage an installation place and appearance of a building by its installation by being selectively equipped with a variety of crime prevention means as one device.

In the crime prevention device 1, many kinds of crime preventing means are individually stored by block bodies 3 comprising common modules and provided for a device main body 2, and the block bodies 3 for storing different crime preventing means can selectively be combined. As the crime preventing means, there are a sensor 41, a lighting 42, a camera 43, a speaker 44, a flash 45, a color ball 46, and the like. The block bodies 3 are provided with a combined recessed part 3c and a combined projecting part 3b, so that they can be rotatably and integrally combined with adjacent block bodies 3.