The critical thermal maximum (CTM) of black rockfish, Sebastes schlegeli, was evaluated. Black rockfish were acclimated at $24^{circ}C$, and then exposed to temperatures from 24 to $33^{circ}C$. Black rockfish were kept in constant darkness and subjected to a gradual temperature increase $(1 ^{circ}C;12^{-1})$. The oxygen consumption rate (OCR) was measured using an automatic intermittent­flow-respirometer (AIFR) during the exposure period (from 119.3 to 143.5 h). The OCR increased from 94.5 to 214.2mL $O_2 kg^{-1};ww;h^{-1}$ as the temperature rose from 24 to $29.4-30.9^{circ}C$. Subsequently, the OCR increased abruptly, reaching 245.8-412.7mL $O_2 kg^{-1};ww;h^{-1}$ at $32^{circ}C$. This study suggests that the CTM for black rockfish is $29.4-30.9^{circ}C$ when temperature is increased at $1^{circ}C;12h^{-1}$ following acclimation at $24^{circ}C$.