To prevent an infant from freely going out of a room, and to improve operability while improving safety and crime prevention.

The lever handle includes: a rotary shaft part 10 supported by a handle seat fixed to the wall surface of a door; a handle part 11 extended in one direction so as to be disposed almost in parallel with the door from the rotary shaft part 10, and disposed so as to be rotatable with the rotary shaft part 10; a button part 12 formed so as to be slidable along the rotary shaft part 10, and protruded at the top end of a shaft 2 to be energized in a top end side slide direction; and an operation piece 13 pivoted at the opposite side of the handle part from the button part 12, and extended from a pivot part 63 to the handle part side so as to be butted to a top end 27 of the button part 12, and formed with a pressurization part 64 at the handle part side from the button part 12.