To take only a little time for cleaning a brush as the after-care of the coating work, carry out the cleaning simply and securely, protect the brush from damage and eliminate the necessity of washing away a coating material off the brush and using the gasoline or the like for cleaning.

A coating material such as a sinner remaining on a brush is sealed so that the material is not volatized. The problem is that the handle of the brush is too long to be sealed. The brush is put in a bag 3 to form a bag cover with handle 1. The brush 4 is stabilized in a contained, and not solidified nor covered and soiled by a coating material. A bar 8 is attached to the brush 4, and a stopper 7 is provided on the container 6.