Cooling equipment (50; 250) for a continuous annealing furnace, the cooling equipment comprising (50; 250): a plurality of injection units (52; 252) disposed in a continuous annealing furnace including a heating zone, a soaking zone, and a cooling zone through which a strip-shaped steel sheet is sequentially fed, the plurality of injection units (52; 252) each being arranged in the cooling zone in sequence from upstream to downstream in a feed direction of the steel sheet and injecting, from a plurality of injection nozzles, a hydrogen-containing cooling gas, onto the steel sheet; and a plurality of circulation systems that connect a plurality of air intake ports, which suck in the cooling gas injected from each of the plurality of injection units (52; 252), with each of the plurality of injection units (52; 252); each of the plurality of circulation systems including an out-path pipe that is connected to one of the plurality of injection units (52; 252), a return-path pipe that is connected to one of the plurality of air intake ports, a heat exchanger that is connected to the out-path pipe and the return-path pipe, a hydrogen supply source that is connected to the out-path pipe, and a blower that is provided on the out-path pipe; the hydrogen supply sources of upstream circulation systems configured to supply more hydrogen into the out-path pipe than the hydrogen supply sources of downstream circulation systems such that a hydrogen concentration distribution is formed in which, in a space of the cooling zone where the plurality of injection units (52; 252) are disposed, a hydrogen concentration at an upstream region is higher than a hydrogen concentration at a downstream region; characterized in that: each plurality of injection nozzles in the plurality of injection units (52; 252) is arranged with an array direction along the feed direction of the steel sheet, and each of the plurality of injection nozzles extends toward the steel sheet; at least injection nozzles positioned at both sides in the array direction in each of the plurality of injection nozzles are inclined so as to slope toward a center of the array direction on progression toward tips of the injection nozzles, and each of the plurality of air intake ports is disposed between injection nozzles, among the plurality of injection nozzles, positioned at both sides in the array direction. a plurality of injection units (52; 252) disposed in a continuous annealing furnace including a heating zone, a soaking zone, and a cooling zone through which a strip-shaped steel sheet is sequentially fed, the plurality of injection units (52; 252) each being arranged in the cooling zone in sequence from upstream to downstream in a feed direction of the steel sheet and injecting, from a plurality of injection nozzles, a hydrogen-containing cooling gas, onto the steel sheet; and a plurality of circulation systems that connect a plurality of air intake ports, which suck in the cooling gas injected from each of the plurality of injection units (52; 252), with each of the plurality of injection units (52; 252); each of the plurality of circulation systems including an out-path pipe that is connected to one of the plurality of injection units (52; 252), a return-path pipe that is connected to one of the plurality of air intake ports, a heat exchanger that is connected to the out-path pipe and the return-path pipe, a hydrogen supply source that is connected to the out-path pipe, and a blower that is provided on the out-path pipe; the hydrogen supply sources of upstream circulation systems configured to supply more hydrogen into the out-path pipe than the hydrogen supply sources of downstream circulation systems such that a hydrogen concentration distribution is formed in which, in a space of the cooling zone where the plurality of injection units (52; 252) are disposed, a hydrogen concentration at an upstream region is higher than a hydrogen concentration at a downstream region; characterized in that: each plurality of injection nozzles in the plurality of injection units (52; 252) is arranged with an array direction along the feed direction of the steel sheet, and each of the plurality of injection nozzles extends toward the steel sheet; at least injection nozzles positioned at both sides in the array direction in each of the plurality of injection nozzles are inclined so as to slope toward a center of the array direction on progression toward tips of the injection nozzles, and each of the plurality of air intake ports is disposed between injection nozzles, among the plurality of injection nozzles, positioned at both sides in the array direction. each plurality of injection nozzles in the plurality of injection units (52; 252) is arranged with an array direction along the feed direction of the steel sheet, and each of the plurality of injection nozzles extends toward the steel sheet; at least injection nozzles positioned at both sides in the array direction in each of the plurality of injection nozzles are inclined so as to slope toward a center of the array direction on progression toward tips of the injection nozzles, and each of the plurality of air intake ports is disposed between injection nozzles, among the plurality of injection nozzles, positioned at both sides in the array direction.