Disclosed are a luminescent device and electric appliance which have low power consumption and a long life. An organic luminescent element is provided by a scheme that a region 204b where the concentrations of first and second organic compounds change gradually is provided in the organic compound layer 203b, a region 201b where the first organic compound can express its function is formed, and a region 202b where the second organic compound can express its function is formed. Thereby the functions of the individual materials are allowed to express. This scheme provides an organic luminescent element which has low power consumption and a long life. A luminescent device and electric appliance are manufactured by using the organic luminescent element.