A wireless communication device which has a first communication terminal and a second communication terminal and is configured to establish a digital link on a wireless channel between the first communication terminal and the second communication terminal, to compress a sound signal in an adaptive differential pulse code modulation (ADPCM) scheme, and to carry the sound signal in a sound packet to perform communication, wherein the first communication terminal includes: an ADPCM encoding unit which is configured to convert a PCM signal into ADPCM data and to output n-bit ADPCM data; a transmission side processing unit (14, 15) which is configured to convert the ADPCM data into data having an operation of an error detection signal by reversing the least significant bit, as an error detection bit, of the n bits according to an error detection method; and a transmission circuit unit which is configured to wirelessly transmit the n-bit data output from the transmission side processing unit (14, 15), and the second communication terminal includes: a reception circuit unit which is configured to receive a wireless signal sent from the first communication terminal and to generate n-bit data from the wireless signal; a reception side processing unit (23, 25) which is configured to determine whether or not an error has occurred according to the error detection method using the n-bit data output from the reception circuit unit and to convert the n-bit data, in which it is determined that the error has occurred, into n-bit ADPCM mute data to output the n-bit ADPCM mute data; and an ADPCM decoding unit which is configured to convert the n-bit ADPCM format data from the reception side processing unit (23, 25) into a PCM signal. an ADPCM encoding unit which is configured to convert a PCM signal into ADPCM data and to output n-bit ADPCM data; a transmission side processing unit (14, 15) which is configured to convert the ADPCM data into data having an operation of an error detection signal by reversing the least significant bit, as an error detection bit, of the n bits according to an error detection method; and a transmission circuit unit which is configured to wirelessly transmit the n-bit data output from the transmission side processing unit (14, 15), and the second communication terminal includes: a reception circuit unit which is configured to receive a wireless signal sent from the first communication terminal and to generate n-bit data from the wireless signal; a reception side processing unit (23, 25) which is configured to determine whether or not an error has occurred according to the error detection method using the n-bit data output from the reception circuit unit and to convert the n-bit data, in which it is determined that the error has occurred, into n-bit ADPCM mute data to output the n-bit ADPCM mute data; and an ADPCM decoding unit which is configured to convert the n-bit ADPCM format data from the reception side processing unit (23, 25) into a PCM signal. a reception circuit unit which is configured to receive a wireless signal sent from the first communication terminal and to generate n-bit data from the wireless signal; a reception side processing unit (23, 25) which is configured to determine whether or not an error has occurred according to the error detection method using the n-bit data output from the reception circuit unit and to convert the n-bit data, in which it is determined that the error has occurred, into n-bit ADPCM mute data to output the n-bit ADPCM mute data; and an ADPCM decoding unit which is configured to convert the n-bit ADPCM format data from the reception side processing unit (23, 25) into a PCM signal.