An incandescent lamp is provided which prevents disconnection of a coupling part between a filament and a lead wire and also which improves impact resistance. A lead wire 4 has, in a standing portion 11 inside of a bulb 2, a first zone 19a to a third zone 19c in order from a top. The third zone 19c further penetrates through a pinch seal part 3 while firmly fixed thereto. The first zone 19a and the second zone 19b are formed of materials consisting primarily of molybdenum and nickel, respectively. The third zone 19c is formed of a Dumet wire 29.