An image transmission apparatus connectable to a plurality of cameras (111, 112) disposed in a vehicle that image an interior of the vehicle, the image transmission apparatus comprising: a receiver that receives, from an external device of the vehicle, an image transmission request including imaging subject information that identifies a passenger of the vehicle to be imaged; a processor that selects, based on the imaging subject information, an image captured by at least one camera of the plurality of cameras (111,112), and executes processing to remove, from the image, other image regions aside from an image region that covers the passenger to be imaged; and a transmitter that transmits the image that has been processed to the external device; characterized in that the plurality of cameras (111, 112) include a first camera that has an imaging range covering a seat of the vehicle, and a second camera that has an imaging range covering a plurality of seats, the imaging subject information includes seat information of the vehicle, and identification information that indicates a feature of a face of the passenger to be imaged, and the processor acquires an image captured by the first camera that corresponds to the seat of the seat information, determines, based on the identification information, whether the passenger to be imaged is included in the image captured by the first camera, when the passenger to be imaged is included in the image captured by the first camera, selects the image captured by the first camera, when the passenger to be imaged is not included in the image captured by the first camera, selects, based on the identification information, an image captured by at least one second camera that has an imaging range covering the passenger to be imaged, and changes the seat information when the passenger to be imaged is not included in the image captured by the first camera. a receiver that receives, from an external device of the vehicle, an image transmission request including imaging subject information that identifies a passenger of the vehicle to be imaged; a processor that selects, based on the imaging subject information, an image captured by at least one camera of the plurality of cameras (111,112), and executes processing to remove, from the image, other image regions aside from an image region that covers the passenger to be imaged; and a transmitter that transmits the image that has been processed to the external device; characterized in that the plurality of cameras (111, 112) include a first camera that has an imaging range covering a seat of the vehicle, and a second camera that has an imaging range covering a plurality of seats, the imaging subject information includes seat information of the vehicle, and identification information that indicates a feature of a face of the passenger to be imaged, and the processor acquires an image captured by the first camera that corresponds to the seat of the seat information, determines, based on the identification information, whether the passenger to be imaged is included in the image captured by the first camera, when the passenger to be imaged is included in the image captured by the first camera, selects the image captured by the first camera, when the passenger to be imaged is not included in the image captured by the first camera, selects, based on the identification information, an image captured by at least one second camera that has an imaging range covering the passenger to be imaged, and changes the seat information when the passenger to be imaged is not included in the image captured by the first camera. acquires an image captured by the first camera that corresponds to the seat of the seat information, determines, based on the identification information, whether the passenger to be imaged is included in the image captured by the first camera, when the passenger to be imaged is included in the image captured by the first camera, selects the image captured by the first camera, when the passenger to be imaged is not included in the image captured by the first camera, selects, based on the identification information, an image captured by at least one second camera that has an imaging range covering the passenger to be imaged, and changes the seat information when the passenger to be imaged is not included in the image captured by the first camera.