The present study investigates the effects of bleed flow on heat/mass transfer in a rotating smooth channel. The hydraulic diameter (D h) of the channel is 40.0 mm and the diameter of the bleed holes (d) on leading surface is 4.5 mm. The tests were conducted under conditions of various bleed flow rates (0%, 10%, 20%) and rotation numbers (0, 0.2, 0.4), while Reynolds number was fixed at 10,000. A naphthalene sublimation method was employed to determine detailed local heat transfer coefficients using heat and mass transfer analogy. The results suggest that heat/mass transfer characteristics in internal cooling passages are influenced by bleed flow and Coriolis force induced by rotation. For cases with the bleed flow, the heat/mass transfer on the leading surface is higher than that without the bleed flow due to tripping flow by suction. With increment of rotation numbers, the heat/mass transfer on the leading surface is increased before Ro=0.2, but is decreased after Ro=0.2 by rotation effects.