The egg and larval development of Rhodeus suigensis of two localities from Korea were observed under the controlled water temperature at 22± 1 ℃ . The eggs of this species in each locality began to hatch about 43 hours after insemination and those larvae reached the free-swimming stage about 20 days after hatching. As regards the comparative development of egg and larval stage in each locality is approximately equal except for a downward projection of the anteriormost part of yolk sac is more intensively developed in Palan-river than in Ansong-river. Moreover, no differences is found in the egg and larval development between R. suigensis from Korea and this species from Japan except for the former reached the free-swimming stage earlier than the latter. In addition, the egg and larval development and minute tubercles on the skin surface of larvae among R. suigensis from Korea and both subspecies of R. atremius and R. suigensis from Japan resemble each other. Uchida`s description for the development of R. notatus is very similar to those of R. atremius and R. suigensis. From these facts, three species of R. atremius, R. suigensis and R. notatus are considered to be separated at subspecies level.