Provided is a hydrogen production apparatus enabling reduction of energy needed for separation and collection of CO2 in the hydrogen production. The hydrogen production apparatus includes a reformer, a heating device heating the reformer, a transformer, a hydrogen separation device separating and taking out hydrogen from transformed gas, a CO2 separation device separating and taking out CO2 from off-gas from which hydrogen was separated by the hydrogen separation device, a heat collecting device collecting heat of the reformed gas, heat of the transformed gas, and waste heat from the heating device, and a heat medium supply device supplying the heat medium having absorbed heat collected by the heat collecting device to the CO2 separation device. The absorption liquid having absorbed CO2 in off-gas is heated by the heat medium heated with collected heat, thereby releasing CO2.