The invention discloses a substrate container which includes a casing and a tray. The tray is detachably connected to the casing, such that the casing can be placed on a loading interface of a loading apparatus through the tray. The tray has a top, a bottom and a guide hole, the top of the tray has a guide surface proximate to the guide hole and is configured to receive a restriction mechanism from the loading interface. The guide surface has a texture formed thereon and adapted for reducing friction between the guide surface and the restriction mechanism.