A hydrogen storage unit, characterized by comprising: a housing; a plurality of storage containers with respective opening valves, the plurality of storage containers being housed in the housing and include hydrogen absorbing alloy; and a temperature control member that is housed in the housing and has a heat medium flowing through the temperature control member so as to heat or cool the storage containers, wherein the storage containers have a cylindrical shape, the storage containers are juxtaposed in the housing, wherein a plurality of temperature control members are provided in the housing, and the temperature control members have respective flow passages (13,14) through which the heat medium flows, and respective flow passages (13,14) of the plurality of temperature control members are arranged in parallel and are connected with each other on one end side of the temperature control members, and an inlet connection portion through which the heat medium in a forward passage is introduced, and an outlet connection portion through which the heat medium in a return passage is discharged are provided in a direction in which the opening valve of the storage container is provided, characterized in that the temperature control member has a shape to fill a space surrounded by side faces of adjacent storage containers and a side face of the housing, and the temperature control member has the flow passage (13,14), which has the forward passage and the return passage formed to fold back on the other end side of the temperature control members, inside the temperature control member, and the forward passage and the return passage are holes that respectively penetrate the temperature control member in the longitudinal direction, a concave portion that connects an end portion of the forward passage and an end portion of the return passage is provided on the other end side of the temperature control member, and a contact plate that is put into contact with an end portion of the forward passage and an end portion of the return passage and closes the end portions and the concave portion is provided. a housing; a plurality of storage containers with respective opening valves, the plurality of storage containers being housed in the housing and include hydrogen absorbing alloy; and a temperature control member that is housed in the housing and has a heat medium flowing through the temperature control member so as to heat or cool the storage containers, wherein the storage containers have a cylindrical shape, the storage containers are juxtaposed in the housing, wherein a plurality of temperature control members are provided in the housing, and the temperature control members have respective flow passages (13,14) through which the heat medium flows, and respective flow passages (13,14) of the plurality of temperature control members are arranged in parallel and are connected with each other on one end side of the temperature control members, and an inlet connection portion through which the heat medium in a forward passage is introduced, and an outlet connection portion through which the heat medium in a return passage is discharged are provided in a direction in which the opening valve of the storage container is provided, characterized in that the temperature control member has a shape to fill a space surrounded by side faces of adjacent storage containers and a side face of the housing, and the temperature control member has the flow passage (13,14), which has the forward passage and the return passage formed to fold back on the other end side of the temperature control members, inside the temperature control member, and the forward passage and the return passage are holes that respectively penetrate the temperature control member in the longitudinal direction, a concave portion that connects an end portion of the forward passage and an end portion of the return passage is provided on the other end side of the temperature control member, and a contact plate that is put into contact with an end portion of the forward passage and an end portion of the return passage and closes the end portions and the concave portion is provided.