PROBLEM TO BE SOLVED: To provide a medical filter which surely prevents generation of a fragment and a frayed spot of a mesh as a filter member, and where a foreign substance failure and a liquid spill do not occur.SOLUTION: A medical filter 10 comprises: a filter member 30 obtained by cutting a bag-shaped mesh 30a processed in such a way that a mesh-shaped sheet formed by crossing a resin warp 31 and a resin woof 32 is made a bag shape and a filter case 20 which houses the filter member 30 in the inside thereof and possesses an inlet port 22a and an outlet port 23a for treated liquid. A cut part 33 side of the filter member 30 is connected to the end of the inlet port side of the filter case 20. The thread end of the woof 32 on the cut end face of the filter member 30 forms a spherical shape, which has a diameter Db larger than a threads thickness Da, in such a way that either one of the adjacent threads is not connected each other.
