Crystal　structure　of　1,　4,　8,　11,　15,　18,　22,　25-octa-butoxyphthalocyaninatocopper　(II)　(1)　was　determined　by　X-ray　diffraction　methods.　The　crystal　system　is　monoclinic,　space　group　is　P21/c,　Z　=　4,　a　=　1.3741(1)　n,　b=　2.6737(1)　nm,　c　=　1.6690(1)　nm,　β=　101.278(1)°.　The　steric　congestion　between　the　neighbouring　butoxyl　groups　causes　the　distortion　of　the　ring　core　of　phthalocyanine　(Pc)　into　a　saddle　shape　conformation.　In　the　crystal　structure,　molecules　stack　along　a　axis　forming　one-dimensional　packing　structure　and　there　are　two　molecular　overlap　types　which　appear　in　turn　with　different　distances　between　molecules,　overlap　area　and　angle.