A rocker arm for an internal combustion engine includes a roller brought into contact with a cam thereby to be rotated, an arm body having a storage portion in which the roller is stored, the arm body being swung by rotation of the cam, thereby opening and closing a valve. The storage portion has an opening edge located on an upper surface of the arm body and opposed to a circumferential surface of the roller, and the opening edge includes a part receiving a lubricant flowing along the upper surface of the arm body, the part being formed with a receiving opening edge jutting out so that both widthwise ends thereof are located away from the circumferential surface of the roller and so that a widthwise central portion thereof comes close to the circumferential surface of the roller.