A coffee pulper is an agricultural processing machine used to remove the outer pulp (skin and fruit flesh) from freshly harvested coffee cherries, leaving the coffee beans inside ready for further processing. It is commonly used on coffee farms and processing stations to speed up post-harvest handling and improve coffee quality. The main components include a feeding hopper, rotating drum or pulping cylinder, adjustable pressure plate, water inlet system (in wet pulping machines), drive system (manual crank, electric motor, or diesel engine), and a discharge outlet for pulp and beans.

In operation, ripe coffee cherries are poured into the feeding hopper. The rotating drum or cylinder pulls the cherries between the drum and the pressure plate, squeezing and rubbing them so that the outer pulp is separated from the beans. In wet pulpers, water is often added to help clean and transport the beans through the system. The separated pulp is discharged on one side, while the clean coffee beans exit through another outlet. The machine is adjusted to avoid damaging the beans during pulping. Coffee pulpers are valued for increasing processing speed, improving bean quality, and reducing manual labor in coffee production.