a frame transmitting apparatus that transmits a frame via a synchronous digital hierarch network or a synchronous optical network , includes a data - amount detecting unit that detects an amount of data received from other apparatus ; and a frame transmitting unit that transmits , when the amount of data detected by the data - amount detecting unit exceeds a predetermined threshold value , a frame in which information pertaining to a frame control is stored in a fixed stuff of a virtual container frame or a synchronous - transport - signal frame .