Abstract: A filter housing cap for water purifier capable of combining and supporting a plurality of filters is disclosed. The filter housing cap for water purifier includes a plurality of engagement portions for engaging with housings having a filter, an inlet for water and an outlet for water formed at any one engagement portion and another engagement portion respectively, and a passage reciprocally communicated with the engagement portions and formed at the cap itself, whereby the shape and the manufacturing process thereof is simple. Also, since the passage is formed in the cap itself, separated parts are unnecessary and a water leakage can be prevented. Moreover, the engagement portions can be arranged at various angles such as a straight line, a right angle and so on, so that it can implement the integrated filter housing cap, thereby it is free from restraint of a establishment space.