Abstract: A bowl B in a dish-accommodating space S comes in engagement at the periphery or rim f thereof with lugs 12, which are movable relatively to reduce or expand an interval between any two adjacent bowls. On the other hand, a support plate 7 makes engagement at a concave edge 13 thereof with the periphery or rim of the bowl B and also abutment at a major surface thereof against the periphery or rim of an adjoining bowl B. That is, any one of bowls B comes in abutment against the major surface of the support plate 1 that is ahead of the bowl B. An operator first loads a conveyor of a dishwasher with a dish container 1 lying on its side and, then, expands the dish container 1. In this way, the bowls B in the dish container 1 are arranged vertically spaced apart from each other in a substantially standing posture. After the completion of the washing, the dish container 1 is contracted to a reduced state where the bowls B come in close relation with each other.