An unmanned aerial vehicle that is configured to deliver a package, the unmanned aerial vehicle comprising: a plurality of rotary wings; a plurality of first motors that rotate the plurality of rotary wings, respectively; a main body that supports the plurality of first motors; a connector that is configured to be connected to a rail, with the main body hanging from the connector, the rail being provided at a position spaced apart from a ground surface; a movable block that sets an inclination of an imaginary plane containing the plurality of rotary wings relative to a support direction in which the connector is supported on the rail; and a control circuit that is configured to control the plurality of first motors, wherein the connector includes: a first end connected to the main body; and a second end that is configured to be slidably connected to the rail, the support direction extends from the first end toward the second end of the connector, and when the second end of the connector is connected to the rail, the control circuit is configured to: set a rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends; characterized in that the control circuit further is configured to control the movable block, and when the second end of the connector is connected to the rail, the control circuit further is configured to: (i) upon setting the rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends, set the rotation rate of the plurality of first motors to a rotation rate that is lower than a minimum rotation rate necessary for causing the unmanned aerial vehicle to float, and (ii) cause the movable block to increase an angle formed by a normal direction of the imaginary plane relative to the support direction of the connector. a plurality of rotary wings; a plurality of first motors that rotate the plurality of rotary wings, respectively; a main body that supports the plurality of first motors; a connector that is configured to be connected to a rail, with the main body hanging from the connector, the rail being provided at a position spaced apart from a ground surface; a movable block that sets an inclination of an imaginary plane containing the plurality of rotary wings relative to a support direction in which the connector is supported on the rail; and a control circuit that is configured to control the plurality of first motors, wherein the connector includes: a first end connected to the main body; and a second end that is configured to be slidably connected to the rail, a first end connected to the main body; and a second end that is configured to be slidably connected to the rail, the support direction extends from the first end toward the second end of the connector, and when the second end of the connector is connected to the rail, the control circuit is configured to: set a rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends; characterized in that the control circuit further is configured to control the movable block, and when the second end of the connector is connected to the rail, the control circuit further is configured to: (i) upon setting the rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends, set the rotation rate of the plurality of first motors to a rotation rate that is lower than a minimum rotation rate necessary for causing the unmanned aerial vehicle to float, and (ii) cause the movable block to increase an angle formed by a normal direction of the imaginary plane relative to the support direction of the connector. set a rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends; characterized in that the control circuit further is configured to control the movable block, and when the second end of the connector is connected to the rail, the control circuit further is configured to: (i) upon setting the rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends, set the rotation rate of the plurality of first motors to a rotation rate that is lower than a minimum rotation rate necessary for causing the unmanned aerial vehicle to float, and (ii) cause the movable block to increase an angle formed by a normal direction of the imaginary plane relative to the support direction of the connector. (i) upon setting the rotation rate of the plurality of first motors to a rotation rate that is higher than a minimum rotation rate necessary for propelling the unmanned aerial vehicle in a direction in which the rail extends, set the rotation rate of the plurality of first motors to a rotation rate that is lower than a minimum rotation rate necessary for causing the unmanned aerial vehicle to float, and (ii) cause the movable block to increase an angle formed by a normal direction of the imaginary plane relative to the support direction of the connector.