Abstract: A keyless latch for an anti-burglary window is positioned between an anti-burglary net window body and an outer window body, including a swing plate for swinging in the inside of a room, a helical member engaging with the swing plate, which then engages with and moving a latch body to shift linearly. Then the latch body can accordingly extend in or out of a latch hole so as to lock or unlock the anti-burglary net window body without a key. Then the anti-burglary window can form a through space for persons inside the room to escape out thereof in case of emergency. The swing plate can be hidden and protected to prevent the glass of the inner or the outer window body from cut illegally. At the same time the swing plate is located inside and impossible to reach from the outside, even if the inner window body is opened, attaining the anti-burglary effect.