To provide a method for manufacturing a honeycomb structure which can effectively prevent the occurrence of a sink defect in a seal part or the opening a hole penetrating the seal part.

In the method for manufacturing the honeycomb structure 1, in the end face of the ceramic honeycomb structure having a plurality of cells to be channels for fluid, the cells of a part are masked 11, and the masked 11 end face of the honeycomb structure is immersed in slurry 10 containing at least a ceramic powder, a dispersion medium, and a binder to form the seal part 2 by injecting the slurry 10 into the residual cells, and the seal part 2 is dried to obtain the honeycomb structure with the residual cells sealed. The seal part 2 is dried by a heat conduction means 12.