An image-transmitting apparatus having a security function is provided. The image-transmitting apparatus having the security function includes a main body which is provided with a wireless or wired interface, a speaker, and an IP camera, either side of which having slide grooves formed in a horizontal direction in the upper and lower portions thereof; and lamp modules having LED lamps and sliders protruding so as to correspond to the respective slide grooves, such that the sliders are inserted into the respective slide grooves in order to couple the lamp modules to either side of the main body, respectively.