To provide a method for plugging a ceramic honeycomb structure capable of preventing the depth of plugs formed of a plug material in its cell end parts to be plugged from becoming uneven.

The method for plugging a ceramic honeycomb structure 86 at first cell end parts 82a by dipping one end face 861 of the ceramic honeycomb structure 86 in slurry 60 containing a plug material 830 while keeping second cell end parts 82b not to be plugged with the plug material 830 in a state of being covered with masking member 2 on the end face 861 upon preparing the ceramic honeycomb structure 86 constituted of a plurality of honeycomb cells penetrating in the axial direction separated by partition walls 81 with the first cell end parts 82a plugged with a plug material which first cell end parts 82a belong to specific honeycomb cells among a plurality of the honeycomb cells is characterized by further comprising a step of pushing the slurry 60 into the end face 861 subsequent to closing an opening 62c of a container 62 with a holding member 61 while holding the ceramic honeycomb structure 86 with the holding member 61 at its end face side planned to be dipped in the slurry 60 upon dipping the ceramic honeycomb structure 86 in the slurry 60 present in the container 62.