A front panel of an indoor unit of an air-conditioner is manufactured by dual injection so that the indoor unit has a beautiful design suitable for various interiors of an indoor space. The front panel of the indoor unit includes a suction grill in which a plurality of ribs are inclinedly arranged and are formed integrally with the front panel by dual injection molding. A sticking section to which a primary injection-molded part is fixed, a sealing section preventing an injection solution from flowing toward the primary injection-molded part during a secondary injection, and a scraping section formed between the adjacent ribs are provided at the ribs.