Abstract: A lock-type fishway comprises a first part having an opening to lower water for discharging water therethrough to lure fishes to the first part and a second part having an opening to upper water. A first pipe between the first and second parts is to be filled with water by closing a gate at the first part for bringing the fishes gathered in the first part to the second part. A second pipe is in parallel to the fishway between the upper water and first part and is provided with a turbine for conducting the luring water therethrough and for recovering energy from the luring water.