A straddle-type vehicle comprising: a louver member (40, 50, 55), installed on a side cowl so as to cover an air discharge port of the straddle-type vehicle, wherein the louver member includes: a frame body including a first frame along a first side edge of the air discharge port and a second frame along a second side edge of the air discharge port opposite to the first side edge;and a first arm portion (45, 51, 56) crossing the air discharge port from the first frame to the second frame, one end of said 2. first arm portion (45, 51, 56) being connected to the first frame, the other end of the first arm portion (45, 51, 56) being connected to the second frame, characterized in that the louver member further comprises: a second arm portion (46, 52, 57) branching from the first arm portion (45, 51, 56) and extending to the second frame so as to cross the air discharge port, one end of the second arm portion (46, 52, 57) branching from said one end of the first arm portion (45, 51, 56) or from an intermediate position of the first arm portion (45,51, 56), the other end of the second arm portion (46, 52, 57) being connected to the second frame, wherein said other end of the first arm portion (45, 51, 56) and said other end of the second arm portion (46, 52, 57) are individually connected to the second frame at different positions of the second frame. a louver member (40, 50, 55), installed on a side cowl so as to cover an air discharge port of the straddle-type vehicle, wherein the louver member includes: a frame body including a first frame along a first side edge of the air discharge port and a second frame along a second side edge of the air discharge port opposite to the first side edge;and a first arm portion (45, 51, 56) crossing the air discharge port from the first frame to the second frame, one end of said 2. first arm portion (45, 51, 56) being connected to the first frame, the other end of the first arm portion (45, 51, 56) being connected to the second frame, characterized in that the louver member further comprises: a second arm portion (46, 52, 57) branching from the first arm portion (45, 51, 56) and extending to the second frame so as to cross the air discharge port, one end of the second arm portion (46, 52, 57) branching from said one end of the first arm portion (45, 51, 56) or from an intermediate position of the first arm portion (45,51, 56), the other end of the second arm portion (46, 52, 57) being connected to the second frame, wherein said other end of the first arm portion (45, 51, 56) and said other end of the second arm portion (46, 52, 57) are individually connected to the second frame at different positions of the second frame. a frame body including a first frame along a first side edge of the air discharge port and a second frame along a second side edge of the air discharge port opposite to the first side edge;and a first arm portion (45, 51, 56) crossing the air discharge port from the first frame to the second frame, one end of said 2. first arm portion (45, 51, 56) being connected to the first frame, the other end of the first arm portion (45, 51, 56) being connected to the second frame, characterized in that the louver member further comprises: a second arm portion (46, 52, 57) branching from the first arm portion (45, 51, 56) and extending to the second frame so as to cross the air discharge port, one end of the second arm portion (46, 52, 57) branching from said one end of the first arm portion (45, 51, 56) or from an intermediate position of the first arm portion (45,51, 56), the other end of the second arm portion (46, 52, 57) being connected to the second frame, wherein said other end of the first arm portion (45, 51, 56) and said other end of the second arm portion (46, 52, 57) are individually connected to the second frame at different positions of the second frame. a second arm portion (46, 52, 57) branching from the first arm portion (45, 51, 56) and extending to the second frame so as to cross the air discharge port, one end of the second arm portion (46, 52, 57) branching from said one end of the first arm portion (45, 51, 56) or from an intermediate position of the first arm portion (45,51, 56), the other end of the second arm portion (46, 52, 57) being connected to the second frame, wherein said other end of the first arm portion (45, 51, 56) and said other end of the second arm portion (46, 52, 57) are individually connected to the second frame at different positions of the second frame.