In recent years，both of fuel price increase and fish price decrease are giving serious economic damage to Japanese fishermen’s management. Especially，the coastal squid jigging fishery requires much fuel for the long distances cruise and the high powered fishing lamps. The fishermen usually decide their behavior of fisheries operation based on their own knowledge and experience. We considered the simulation study may help fishermen to make optimum decision in the behavior of fisheries and contribute to profit maximization. We conducted the simulation for fishery profit maximization including various factors of the squid jigging fishery，and showed that the profits are very sensitive to several factors such as fish prices，fuel prices，the distances from the ports to the fishing grounds，and the ship speeds. We concluded that development of the simulation study would contribute to optimization of fishermen’s behavior and to maximization of the profits near future.