To provide a lift generator which miniaturizes a rotor of a vertical take-off and landing aircraft, approaches an object without bringing the rotor with the object in a rescue case or the like, and improves the versatility of the aircraft design.

A high-pressure fluid ejector body (6) to eject the high-pressure fluid produced by an air compressor or the like is installed on a lower part of the rotor, the high-pressure fluid is ejected on the lower part of the rotor rotated by a power source (1), and the rotor is miniaturized by increasing the differential air pressure, i.e., the lift, generated on the upper and lower parts of blades. Any contact of the rotor is prevented, and the versatility of the aircraft design is improved thereby.