The utility model belongs to the technical field of grouter, refer in particular to a grouter, including the frame, be provided with out liquid device, power device in the frame to and the transmission of connection power device and play liquid device, going out the liquid device and including converging the seat, being the inner chamber in the middle part of the seat that converges, the activityis provided with the plunger in the inner chamber, and the inner chamber has outwards switched on liquid inlet channel and liquid channel, and the liquid inlet channel port can be dismantled and be provided with the liquid storage pot, and the liquid channel port can be dismantled and be provided with out the liquid check valve, transmission includes gear assembly, eccentric wheel and drive connecting rod, the gear assembly include by the pinion of power device direct drive and with pinion engaged with gear wheel, the synchronous rotation of gear wheel lower extreme has the eccentric wheel, the eccentric wheel lower extreme swing joint have the drive connecting rod, the drive connecting rod drives under the effect of eccentric wheel the plunger carries out reciprocating motion, the utilitymodel provides a simple structure and stable, easy maintenance's grouter.