A light emitting module including a projecting light source and a marking light source is provided. The projecting light source emits light with wave length between 100 nm and 400 nm or larger than 700 nm. The marking light source emits light with wave length between 400 nm and 780 nm. Light emitted from the projecting light source projects a first projecting area on a first plane. The optical axis of the marking light source is within the first projecting area on the first plane.一種發光模組,包括一投射光源以及一標記光源。投射光源發出一波長介於100~400nm或波長大於700nm的光線。標記光源發出一波長介於400~780nm的光線。投射光源所發出的光線,在一第一平面上投射出一第一投射範圍,標記光源之光軸在第一平面上係位於第一投射範圍內。100‧‧‧發光模組10‧‧‧載板20‧‧‧投射光源31‧‧‧標記光源C1‧‧‧第一投射範圍C01‧‧‧中心D‧‧‧投射光源與標記光源的距離D1‧‧‧第一平面與載板的距離L20、L31‧‧‧光軸P1‧‧‧第一平面θ‧‧‧標記光源之光軸與載板的夾角
