A digital broadcast receiving device mounted on a vehicle, comprising: a vehicle information obtaining means adapted to obtain vehicle information that is information about the vehicle; a demodulating means adapted to receive a digital broadcast wave, demodulate the digital broadcast wave, and output a reception state of the digital broadcast wave; a plurality of digital broadcast decoders (200, 201) adapted to decode a signal demodulated by the demodulating means and output digital broadcast images different from one another; a switching threshold storing means adapted to store in advance a switching threshold used in choosing, in accordance with the reception state, which one of the plural digital broadcast decoders (200, 201) is to decode the signal demodulated by the demodulating means; and a decoder switching means adapted to consult the switching threshold storing means to obtain a switching threshold, adapted to choose one of the digital broadcast decoders (200, 201) to decode the signal demodulated by the demodulating means, and adapted to display results of the decoding on a display device, characterised in that the switching threshold stored in the switching threshold storing means varies depending on the vehicle information, the decoder switching means is adapted to consult the switching threshold storing means to obtain the switching threshold that is associated with the obtained vehicle information, the digital broadcast wave is transmitted by hierarchical transmission and carries both a digital broadcast image of low resolution for mobile receivers and a digital broadcast image of high resolution for stationary receivers, the plural digital broadcast decoders (200, 201) include: a mobile reception decoder adapted to decode the signal demodulated by the demodulating means and output the digital broadcast image of low resolution for mobile receivers; and a stationary reception decoder adapted to decode the signal demodulated by the demodulating means and output the digital broadcast image of high resolution for stationary receivers, and the decoder switching means is adapted to choose, based on the switching threshold obtained from the switching threshold storing means and the reception state output by the demodulating means, which of the stationary reception decoder and the mobile reception decoder is to decode the signal demodulated by the demodulating means. a vehicle information obtaining means adapted to obtain vehicle information that is information about the vehicle; a demodulating means adapted to receive a digital broadcast wave, demodulate the digital broadcast wave, and output a reception state of the digital broadcast wave; a plurality of digital broadcast decoders (200, 201) adapted to decode a signal demodulated by the demodulating means and output digital broadcast images different from one another; a switching threshold storing means adapted to store in advance a switching threshold used in choosing, in accordance with the reception state, which one of the plural digital broadcast decoders (200, 201) is to decode the signal demodulated by the demodulating means; and a decoder switching means adapted to consult the switching threshold storing means to obtain a switching threshold, adapted to choose one of the digital broadcast decoders (200, 201) to decode the signal demodulated by the demodulating means, and adapted to display results of the decoding on a display device, characterised in that the switching threshold stored in the switching threshold storing means varies depending on the vehicle information, the decoder switching means is adapted to consult the switching threshold storing means to obtain the switching threshold that is associated with the obtained vehicle information, the digital broadcast wave is transmitted by hierarchical transmission and carries both a digital broadcast image of low resolution for mobile receivers and a digital broadcast image of high resolution for stationary receivers, the plural digital broadcast decoders (200, 201) include: a mobile reception decoder adapted to decode the signal demodulated by the demodulating means and output the digital broadcast image of low resolution for mobile receivers; and a stationary reception decoder adapted to decode the signal demodulated by the demodulating means and output the digital broadcast image of high resolution for stationary receivers, and a mobile reception decoder adapted to decode the signal demodulated by the demodulating means and output the digital broadcast image of low resolution for mobile receivers; and a stationary reception decoder adapted to decode the signal demodulated by the demodulating means and output the digital broadcast image of high resolution for stationary receivers, and the decoder switching means is adapted to choose, based on the switching threshold obtained from the switching threshold storing means and the reception state output by the demodulating means, which of the stationary reception decoder and the mobile reception decoder is to decode the signal demodulated by the demodulating means.