PROBLEM TO BE SOLVED: To make it possible to display seedling raising pots three-dimensionally.SOLUTION: A plurality of pot housing parts 17 for housing seedling raising pots 51 in a standing manner are arrayed for a base frame 10 of trays 11,12,13 for seedling raising pot. Hooking parts 33 for hooking a bottom edge of the pot housing parts 17 are provided for an upper edge of the pot housing parts 17 of other trays 11,12,13 for seedling raising pot. The base frame 10 consists of an outer frame 14 and inner frames 15,16 which are provided vertically and horizontally for an inner side of the outer frame 14, and the pot housing parts 17 are arrayed in a grid pattern state between the outer frame 14 and the inner frames 15,16 and between the inner frames 15,16, and the hooking parts 33 are formed on an upper edge of the inner frames 15,16.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT