Filter case for shower having function of adjusting quantity of outflow of filling material

A filter case for a shower having a function of adjusting a quantity of outflow of a filling material, the filter case being embedded at the inside of the shower in the state where a water-soluble filling material is filled thereinto, the filter case comprising:

• a cylindrical body having a predetermined length and one end portion opened, for containing the filling material into the interior thereof;
• and
• an outflow quantity-adjusting means having a fixing part having one or more communicating holes adapted to communicate with the interior and exterior of the body, the fixing part being fitted to one end portion opened of the body, and a rotating part having a discharge hole formed at the inside thereof in such a manner as to be passed through the upper and lower surfaces thereof, the rotating part being screw-coupled to the inner periphery of the fixing part so as to block the communicating holes of the fixing part, wherein as the rotating part is rotated around the fixing part, the communicating holes of the fixing part are opened to form a space portion having a predetermined size between the communicating holes of the fixing part and the discharge hole of the rotating part, thereby adjusting the quantity of outflow of the filling material.