A A compressor is a tool for compressing air/gas; the working principle of a compressor is that if the volume of a gas in a closed space is reduced, the gas will experience an increase in pressure. Here the compressor uses a piston that works back and forth in the cylinder to suck, pressurize or release gas repeatedly. In carrying out compression, the gas must not leak through the gap between the piston wall and the cylinder that rub against each other. For this reason, a piston ring is used as a seal. In this final assignment, a single-stage piston compressor will be designed with a capacity of 0.254 m3/minute with a rotation of 1250 rpm and an outlet pressure of 6 bar. So from the calculation results, the piston diameter is 62 mm and the length of the drive rod is 171.43 mm