百叶帘是窗帘的一种，由一条一条貌似叶片的细长条状素材所构成。

常见的材质有木制、布制、塑胶制及铝制等。

A window blind is a type of window covering. There are many different kinds of window blinds which use a variety of control systems. A typical window blind is made up of several long horizontal or vertical slats of various types of hard material, including wood, plastic or metal which are held together by cords that run through the blind slats. Window blinds can be maneuvered with either a manual or remote control by rotating them from an open position, with slats spaced out, to a closed position where slats overlap and block out most of the light. There are also several types of window coverings, called shades, that use a single piece of soft material instead of slats.