The present invention relates to a grain filter comprising: a collecting container having a containing space portion of which an upper portion is open; a filter operating element installed in the open upper portion of the collecting container; and a filtering body formed in the filter operating element, and forming a porous portion to filter a grain particle and an impurity which is greater than or equal to a certain size. Therefore, the present invention enables to quickly and simply carry out a sorting process that grain powder passes through the porous portion as well as preventing in advance the grain powder from being spilled outside the collecting container so the periphery gets dirty.
