A hermetic compressor comprising: a sealed case; and a compression mechanism accommodated in the sealed case, wherein the compression mechanism includes a cylinder having a cylinder chamber, a closing member (26, 32A) fixed to one end surface of the cylinder to close the cylinder chamber, an end plate overlapped with the closing member (26, 32A), an injection flow path through which refrigerant is supplied into the cylinder chamber, a roller configured to compress the refrigerant that flows into the cylinder chamber, and a check valve device provided in the injection flow path, wherein the injection flow path includes an injection path formed in the closing member (26, 32A), and having one end opened to the cylinder chamber and another end opened toward the end plate, a communication path provided between the closing member (26, 32A) and the end plate, and connected to the injection path, and an introduction path provided in either one of the closing member (26, 32A) or the end plate, and having one end and another end, the one end being opened in a direction along which the closing member (26, 32A) and the end plate overlap with each other and being connected to the communication path, and the another end being connected to an injection introduction pipe that communicates with an outside of the sealed case, wherein the check valve device includes a reed valve that opens and closes the introduction path, a valve retainer configured to regulate an opening degree of the reed valve, and a fixing member that fixes the reed valve and the valve retainer, and wherein the reed valve and the valve retainer are fixed to the closing member (26, 32A) or the end plate in which the introduction path is provided. a sealed case; and a compression mechanism accommodated in the sealed case, wherein the compression mechanism includes a cylinder having a cylinder chamber, a closing member (26, 32A) fixed to one end surface of the cylinder to close the cylinder chamber, an end plate overlapped with the closing member (26, 32A), an injection flow path through which refrigerant is supplied into the cylinder chamber, a roller configured to compress the refrigerant that flows into the cylinder chamber, and a check valve device provided in the injection flow path, a cylinder having a cylinder chamber, a closing member (26, 32A) fixed to one end surface of the cylinder to close the cylinder chamber, an end plate overlapped with the closing member (26, 32A), an injection flow path through which refrigerant is supplied into the cylinder chamber, a roller configured to compress the refrigerant that flows into the cylinder chamber, and a check valve device provided in the injection flow path, wherein the injection flow path includes an injection path formed in the closing member (26, 32A), and having one end opened to the cylinder chamber and another end opened toward the end plate, a communication path provided between the closing member (26, 32A) and the end plate, and connected to the injection path, and an introduction path provided in either one of the closing member (26, 32A) or the end plate, and having one end and another end, the one end being opened in a direction along which the closing member (26, 32A) and the end plate overlap with each other and being connected to the communication path, and the another end being connected to an injection introduction pipe that communicates with an outside of the sealed case, an injection path formed in the closing member (26, 32A), and having one end opened to the cylinder chamber and another end opened toward the end plate, a communication path provided between the closing member (26, 32A) and the end plate, and connected to the injection path, and an introduction path provided in either one of the closing member (26, 32A) or the end plate, and having one end and another end, the one end being opened in a direction along which the closing member (26, 32A) and the end plate overlap with each other and being connected to the communication path, and the another end being connected to an injection introduction pipe that communicates with an outside of the sealed case, wherein the check valve device includes a reed valve that opens and closes the introduction path, a valve retainer configured to regulate an opening degree of the reed valve, and a fixing member that fixes the reed valve and the valve retainer, and a reed valve that opens and closes the introduction path, a valve retainer configured to regulate an opening degree of the reed valve, and a fixing member that fixes the reed valve and the valve retainer, and wherein the reed valve and the valve retainer are fixed to the closing member (26, 32A) or the end plate in which the introduction path is provided.