This paper describes the following 12 isopods species belonging respectively to 8 genera of the Family Sphaeromatidae, from Chinese waters. Those marked with an asterisk (*) are recorded for the first time from Chinese waters: *Cilicaea crassicaudata Haswell, 1881 *Cilicaeopsis whiteleggei (Stebbing, 1905) Cymodoce japonica Richardson, 1904 *Cymodoce longistylis Miers, 1884 Gnorimosphaeroma rayi Hoestlandt, 1969 Paracerceis sculpta (Holmes, 1904) Paracilicaea asiatica Kussakin, Malyutina and Rostomov, 1990 Paradella dianae (Menzies, 1962) Sphaeroma retrolaeve Richardson, 1904 *Sphaeroma terebrans Bate, 1866 *Sphaeroma triste Heller, 1865 Sphaeroma walkeri Stebbing, 1905