A light emitting element of the invention includes n pieces of light
emitting layers (n is a natural number) between first and second
electrodes. A first layer and a second layer are provided between the
m.sup.th light emitting layer (m is a natural number of
1.ltoreq.m.ltoreq.n) and the m+1.sup.th light emitting layer. The first
and second layers are contacted to each other. The first layer contains a
substance that transports holes easily and a substance with an electron
accepting property. The second layer contains a substance that transports
electrons easily and a substance with an electron donating property.
Molybdenum oxide is used as the substance with the electron accepting
property.