In a first aspect of the present invention, a lighting device (100) includes a first light emitter (1) that includes a first light-emitting element (10) with a p-n junction (10g), and a first side cover (11) partly covering a peripheral side surface (10c-10f) of the first light-emitting element (10); a second light emitter (2) that includes a second light-emitting element (20) with a p-n junction (20g) and a second side cover (21) partly covering a peripheral side surface (20c-20f) of the second light-emitting element (20), and the first light emitter (1) and the second light emitter (2) are disposed to face each other at uncovered side portions (10c, 20c) that are uncovered by the first side cover (11) and the second side cover (21). It is disclosed that the first side cover (11) covers a quarter or more area of the peripheral side surface (10c-10f) of the first light-emitting element (10).