A compressor comprising: a shell ; a compressing mechanism provided in the shell , and having a compression chamber where refrigerant is compressed and a discharge port from which the refrigerant compressed in the compression chamber is discharged; and a discharge-valve mechanism provided in a discharge chamber provided between the shell and the compressing mechanism , the discharge-valve mechanism being configured to open and close the discharge port , wherein the discharge-valve mechanism includes a valve seat attached to the compressing mechanism and having a valve-seat hole communicating with the discharge port , and a reed valve having a fixed end attached to the compressing mechanism and a distal end as a free end, the reed valve being configured to close the valve seat when the reed valve is located on the valve seat , wherein the valve seat is formed of material having a longitudinal elastic modulus lower than a longitudinal elastic modulus of the compressing mechanism , wherein the valve-seat hole has a diameter larger than a diameter of an opening end of the discharge port that is located on an outlet side of the discharge port , characterized in that with regard to a contact length between the reed valve and the valve seat on a center line that extends in an extending direction of the reed valve through a central portion of the reed valve in a width direction of the reed valve , a contact length at one of regions located on opposite sides of the valve-seat hole on the center line that is a region closer to the distal end of the reed valve is smaller than a contact length at the other region that is a region closer to the fixed end of the reed valve . a shell ; a compressing mechanism provided in the shell , and having a compression chamber where refrigerant is compressed and a discharge port from which the refrigerant compressed in the compression chamber is discharged; and a discharge-valve mechanism provided in a discharge chamber provided between the shell and the compressing mechanism , the discharge-valve mechanism being configured to open and close the discharge port , wherein the discharge-valve mechanism includes a valve seat attached to the compressing mechanism and having a valve-seat hole communicating with the discharge port , and a reed valve having a fixed end attached to the compressing mechanism and a distal end as a free end, the reed valve being configured to close the valve seat when the reed valve is located on the valve seat , a valve seat attached to the compressing mechanism and having a valve-seat hole communicating with the discharge port , and a reed valve having a fixed end attached to the compressing mechanism and a distal end as a free end, the reed valve being configured to close the valve seat when the reed valve is located on the valve seat , wherein the valve seat is formed of material having a longitudinal elastic modulus lower than a longitudinal elastic modulus of the compressing mechanism , wherein the valve-seat hole has a diameter larger than a diameter of an opening end of the discharge port that is located on an outlet side of the discharge port , characterized in that with regard to a contact length between the reed valve and the valve seat on a center line that extends in an extending direction of the reed valve through a central portion of the reed valve in a width direction of the reed valve , a contact length at one of regions located on opposite sides of the valve-seat hole on the center line that is a region closer to the distal end of the reed valve is smaller than a contact length at the other region that is a region closer to the fixed end of the reed valve . <EOS>