A digital signal recording device including: a digital broadcasting receiver which receives a digital broadcasting signal; an analog tuner which receives an analog broadcasting signal in which an analog video signal and an analog audio signal are multiplexed; a video A/D converter which converts to a digital video signal; a recording selection unit which selects the digital signal received by the digital broadcasting receiver or the signal multiplexed by the multiplexer; a recording unit which records the digital signal selected by the recording selection unit; and wherein the digital signal recording device is operable in a first mode in which the received digital signal is recorded and in a second mode in which the multiplexed digital signal is recorded, and the clock selecting unit selects the clock inputted from the first clock generator in the first mode and selects the internal clock in the second mode.