This paper describes five species of Porphyra (Rhodophyceae, Bangiales) from the coasts of Taiwan. They are Porphyra angusta Ueda, Porphyra dentata Kjellman, Porphyra crispata Kjellman, Porphyra Subobiculata Kjellman, and Porphyra sp.. Of these, only P. crispata has previously been reported (Okamura, 1936; Shen and Fan, 1950; Chiang, 1962) while the other four are newly recorded.