A novel crystal form of 1-(&bgr;-D-glucopyranosyl)-4-methyl-3-[5-(4-fluorophenyl)-2-thienylmethyl]benzene hemihydrate, and having favorable characteristics, is characterized by its x-ray powder diffraction pattern and/or by its infra-red spectrum.본 발명은 바람직한 특성을 갖는 1-(β-D-글루코피라노실)-4-메틸-3-〔5-(4-플루오로페닐)-2-티에닐메틸〕벤젠의 반수화물의 신규 결정형은 그의 X선 분말 회절 패턴 및/또는 그의 적외선 스펙트럼에 특징이 있다.