An aerosol generating apparatus (100A; 100B), comprising: a power supply; a load configured to generate heat upon receipt of electric power from the power supply and atomize an aerosol source; an element that is used to acquire a value related to a temperature of the load; a circuit configured to electrically connect the power supply and the load, wherein the circuit includes a first path and a second path that are connected in parallel to the power supply; a storage configured to store the aerosol source; a retention unit configured to retain the aerosol source supplied from the storage to allow the retained aerosol source to be in a feasible state of being heated by the load; and a control unit configured to: distinguish between a first state of the aerosol generating apparatus (100A; 100B) in which the aerosol source stored in the storage is insufficient in quantity, and a second state of the aerosol generating apparatus (100A; 100B) in which the storage is capable of supplying the aerosol source while the aerosol source retained by the retention unit is insufficient in quantity, on a basis of a change in the value related to the temperature of the load, wherein the value is acquired by switching from a state in which the first path functions to a state in which the second path functions after the functioning of the circuit or during the functioning of the circuit; perform a first control upon detection of the first state; and perform a second control different from the first control upon detection of the second state. a power supply; a load configured to generate heat upon receipt of electric power from the power supply and atomize an aerosol source; an element that is used to acquire a value related to a temperature of the load; a circuit configured to electrically connect the power supply and the load, wherein the circuit includes a first path and a second path that are connected in parallel to the power supply; a storage configured to store the aerosol source; a retention unit configured to retain the aerosol source supplied from the storage to allow the retained aerosol source to be in a feasible state of being heated by the load; and a control unit configured to: distinguish between a first state of the aerosol generating apparatus (100A; 100B) in which the aerosol source stored in the storage is insufficient in quantity, and a second state of the aerosol generating apparatus (100A; 100B) in which the storage is capable of supplying the aerosol source while the aerosol source retained by the retention unit is insufficient in quantity, on a basis of a change in the value related to the temperature of the load, wherein the value is acquired by switching from a state in which the first path functions to a state in which the second path functions after the functioning of the circuit or during the functioning of the circuit; perform a first control upon detection of the first state; and perform a second control different from the first control upon detection of the second state. distinguish between a first state of the aerosol generating apparatus (100A; 100B) in which the aerosol source stored in the storage is insufficient in quantity, and a second state of the aerosol generating apparatus (100A; 100B) in which the storage is capable of supplying the aerosol source while the aerosol source retained by the retention unit is insufficient in quantity, on a basis of a change in the value related to the temperature of the load, wherein the value is acquired by switching from a state in which the first path functions to a state in which the second path functions after the functioning of the circuit or during the functioning of the circuit; perform a first control upon detection of the first state; and perform a second control different from the first control upon detection of the second state.