A light-emitting portion (140) is formed on a first surface (S1) of a substrate (100), and includes a light-transmitting first electrode (110), a light-reflective second electrode (130), and an organic layer (120) located between the first electrode (110) and the second electrode (130). A light-transmitting region is located between a plurality of light-emitting portions (140). A cover member (200) covers the light-emitting portions (140). A low refractive index layer (400) is located on the first surface (S1) side of the substrate (100), and has a refractive index nL lower than a refractive index nS of the substrate (100).