Spawning induction, egg development and larval growth of ark shell (Tegillarca granosa) (L.) were investigated. The most effective method of spawning induction was steady temperature increasing from$4^{circ}C;to;28^{circ}C$ with irradiation of sea water by UV after T. granosa was exposed to air at $4^{circ}C$ Optimum condition for larval roaring was under the 32.4 psu and two temperature $regimes:;28{pm}1^{circ}C;and ;25{pm}1^{circ}C$. Fertilized eggs was demersal isolated eggs, and egg diameter was $60{mu}$. D-shaped larvae appear about 20 hr after hatching with $94.1{mu}$ in shell length and $86.7{mu}$ in shell height. Ten days were required from hatching to umbo larva stage, of a mean shell length $125.2{mu}$. On 25th day, the larva grew to $450{mu}$ in shell length and began to settle on the bottom. Effect of temperature between $25^{circ}C$ (control group) and $28^{circ}C$ on larval growth was not different. Survival rate of larvae settled on the bottom was about $19{\%}$ in both temperatures conditions $(25^{circ}C;and;28^{circ}C)$.