A hydrogen cooling apparatus configured to cool hydrogen transported in a hydrogen passage; the hydrogen cooling apparatus comprising: a first coolant passage through which a first coolant circulates; an air-cooled condenser disposed on a part of the first coolant passage so as to enable cooling of the first coolant by driving an air-cooling fan; a second coolant passage through which a second coolant flows; a first heat exchanger enabling cooling of the second coolant by the first coolant, between another part of the first coolant passage and a part of the second coolant passage; a pressure detecting sensor (26, 41) configured to detect a pressure of the first coolant from the air-cooled condenser to the first heat exchanger; an inverter controller configured to inverter control a driving rotational speed of the air-cooling fan based on the pressure detected by the pressure detecting sensor (26, 41) in such a manner that the pressure is maintained between 1.5 MPa and 1.7 MPa; and a second heat exchanger enabling cooling of the hydrogen by the second coolant, between another part of the second coolant passage and a part of the hydrogen passage; wherein: the first coolant is flon; the second coolant is potassium formate solution; a flow rate of the second coolant flowing through the second coolant passage is between 135 L/min and 165 L/min at a flow pressure of 0.3 Mpa; the second heat exchanger is configured to cool the hydrogen down to a temperature range of between -43° C. and -20° C.; the second heat exchanger is configured to cool the hydrogen to a temperature within an error span between +2° C. and -3° C. with respect to a set temperature within the temperature range of between -43° C. and -20° C.; a hydrogen cooling power for cooling hydrogen to -40° C. is between 13.5 kW and 16.5 kW; the hydrogen passage has an outlet port configured such that the hydrogen having been cooled by the second heat exchanger is discharged from the outlet port; and a flow rate of the hydrogen discharged from the outlet port is between 4.5 kg/3 minutes and 5.5 kg/3 minutes. a first coolant passage through which a first coolant circulates; an air-cooled condenser disposed on a part of the first coolant passage so as to enable cooling of the first coolant by driving an air-cooling fan; a second coolant passage through which a second coolant flows; a first heat exchanger enabling cooling of the second coolant by the first coolant, between another part of the first coolant passage and a part of the second coolant passage; a pressure detecting sensor (26, 41) configured to detect a pressure of the first coolant from the air-cooled condenser to the first heat exchanger; an inverter controller configured to inverter control a driving rotational speed of the air-cooling fan based on the pressure detected by the pressure detecting sensor (26, 41) in such a manner that the pressure is maintained between 1.5 MPa and 1.7 MPa; and a second heat exchanger enabling cooling of the hydrogen by the second coolant, between another part of the second coolant passage and a part of the hydrogen passage; wherein: the first coolant is flon; the second coolant is potassium formate solution; a flow rate of the second coolant flowing through the second coolant passage is between 135 L/min and 165 L/min at a flow pressure of 0.3 Mpa; the second heat exchanger is configured to cool the hydrogen down to a temperature range of between -43° C. and -20° C.; the second heat exchanger is configured to cool the hydrogen to a temperature within an error span between +2° C. and -3° C. with respect to a set temperature within the temperature range of between -43° C. and -20° C.; a hydrogen cooling power for cooling hydrogen to -40° C. is between 13.5 kW and 16.5 kW; the hydrogen passage has an outlet port configured such that the hydrogen having been cooled by the second heat exchanger is discharged from the outlet port; and a flow rate of the hydrogen discharged from the outlet port is between 4.5 kg/3 minutes and 5.5 kg/3 minutes. the first coolant is flon; the second coolant is potassium formate solution; a flow rate of the second coolant flowing through the second coolant passage is between 135 L/min and 165 L/min at a flow pressure of 0.3 Mpa; the second heat exchanger is configured to cool the hydrogen down to a temperature range of between -43° C. and -20° C.; the second heat exchanger is configured to cool the hydrogen to a temperature within an error span between +2° C. and -3° C. with respect to a set temperature within the temperature range of between -43° C. and -20° C.; a hydrogen cooling power for cooling hydrogen to -40° C. is between 13.5 kW and 16.5 kW; the hydrogen passage has an outlet port configured such that the hydrogen having been cooled by the second heat exchanger is discharged from the outlet port; and a flow rate of the hydrogen discharged from the outlet port is between 4.5 kg/3 minutes and 5.5 kg/3 minutes.