To rightly pile small containers after completion of washing without using power and to easily take out the piled small containers.

This device is constituted of a lowered and inclined slide 7 for sliding down the small containers 5 from an exit conveyor 3 and a container storage reservoir part 9 for piling the small containers 5 slipping down from a termination of the slide 7 in a prescribed height to be aligned. The slide 7 is formed by supporting two surfaces of a bottom part guide supporting surface 13 rotated and inclined by a prescribed angle to either one of both sides in the lowered and inclined state and a side guide supporting surface 15 rising from the lowered and inclined side of the bottom part guide supporting surface 13 to support the sides of the small containers 5. The container storage reservoir part 9 is provided with an abutting member 21 for dropping the small containers 5 slipping down from the termination of the slide 7 after making the containers 5 abut once and an insertion opening part 31 for taking out the lowermost small container 5 of the containers 5 piled up to a prescribed height by inserting the hand under the container 5.