A wafer container including a container body having an opening formed on one sidewall and a door joining with the opening, the characteristic of the wafer container in that: A latch component disposed in a platform of the door comprising an oval cam with an arrester disposed at its center, one surface of the oval cam being disposed with at least a groove, a pair of moving bars respectively having an engaging portion that is engaged in the groove for the pair of moving bars to be engaged with the oval cam, a guiding element disposed at the center of the oval cam, and a long narrow spring framingly disposed on the guiding element, wherein the arrester is used to control the rotation of the oval cam for the moving bars to go to and fro between the pair of socket holes and the pair of latch holes.