Provided are a frequency band determination device, a head-mounted display, a frequency band determination method, and a program that are capable of unprecedentedly quickly changing the frequency band used for communication in accordance with a change in an environment in which a communication device and a communication partner are placed. An image acquisition section acquires an image of an environment in which at least either an HMD or a communication partner for the HMD is placed. Based on the image acquired by the image acquisition section, a frequency band determination section determines the frequency band of radio waves used for communication between the HMD and the communication partner.