A securing device for a window includes a fixed support, a slide rod pivoted to the window and displaceably passed through a transverse hole of the fixed support, and a knob screwed into an axial screw hole of the fixed support for securing the slide rod after the window is moved to an intended position; a pair of curved pads is used for protecting the slide rod from scratching of the fixed support; each pad has a curved main body with convex and concave sides, an engaging protrusion on the convex side, and several ribs formed around and connected to the engaging protrusion; the pads are respectively positioned in the axial hole, and the fitting cavity with the concave sides facing each other, and with the ribs being pressed against inner sides of the fixed support for preventing the pads from falling off.