Potttiaceae includes up to 5,311species worldwide. It is the largest moss family in Libya with 41 out of a total of 98 species known from this country. Most of the species are quite old records based on collections published before 1932. In this recent work 20 Pottiaceae mosses are reported from Libya including two new records namely; Microbryum rectum (With.) R.H.Zander and Weissia controversa var. crispata (Nees and Hornsch.) Nyholm. Descriptions and illustrations of the two new records together with geographic distribution and brief comments on all taxa are given.