To provide a bottle washer which, when used in washing containers such as bottles and PET bottles, is easy to handle, readily removes dirt from inside corners, and is easy to store after use.

An assembly composed of a scrubbing strip brush 3 and several balls 4 buried therein or of several scrubbing brushes joined with each other through a string is connected through a connection string 2 to a cap 1 for preventing a washing fluid from being spattered.