The lighting device

Provided is an illuminating apparatus which has a configuration wherein leaking light is positively used and can be a substitute for conventional halogen bulbs. The illuminating apparatus is provided with a cylindrical or bowl-shaped heat dissipating device (12) having a bottom section and a side surface section, and an LED element (18b) arranged on the bottom section in the heat dissipating device (12). The heat dissipating device (12) is provided with one or a plurality of window sections (19) which leak light outputted from the LED element (18b) to the outside of the heat dissipating device (12).