The study was aimed to determine length-weight relationship of Eriphia verrucosa (Forskal, 1775) as a basis for conversions. The study was carried out in Izmir Bay, the middle of Aegean sea between October 2008 and January 2009. The experiments were collected by skin divers between. All sampled individuals were sorted according to sex by checking the abdominal flap. The length-weight relationship between Weight (W) and Carapace Length (CL) were found as W = 15.02xCL(0.3228) for female, W = 8.86xCL(0.4073) for male W = 8.72x CL0.4074 for combined sexes. Females were generally smaller than males (K-S test; p<0.05). Comparison of length-weight regression lines with sexes revealed that there was a statistically significant difference (F test = 0.01, p<0.05).