To provide an advertisement display device provided with a public telephone function offering toll-free service depending on the advertisement rates of displayed advertisement by displaying the advertisement on the display device.

The advertisement display device is provided with: an input means for displaying advertisement information, etc.; an input means for inputting a telephone number, etc.; an advertisement information storage means for storing the advertisement information; a communication control means for controlling communication with the Internet; a call control means for controlling call connection to a public telephone line network; a central processor for controlling the respective means based on a prescribed program; and a handset for converting voice into electric signals.