Provided are: a light-emitting device that is capable of suppressing connection failures involving light-emitting elements and of achieving superior conductivity; and a method for manufacturing the light-emitting device. A substrate includes the following: a first mounting region (31) in which a first light-emitting element (11) is mounted; a second mounting region (32) in which a second light-emitting element (12) is mounted; a first electrode (21) to which one of electrodes of the first light-emitting element (11) and one of electrodes of the second light-emitting element (12) are connected;a second electrode (22) which is formed in the first mounting region (31) and to which the other electrode of the first light-emitting element (11) is connected; and a third electrode (23) which is formed in the second mounting region (32) and to which the other electrode of the second light-emitting element (12) is connected. The first electrode (21) has formed therein a groove (33) located between the first mounting region (31) and the second mounting region (32).