To prevent each light emitting element from being embedded in a shade of leaves of trees or directed in an undesired direction at the time of mounting a linelike light emitting unit having a plurality of the elements arranged at an electric wire at the tree.

A first connector 11 is provided at one end, a second connector is provided at the other end, and a light emitting element mount 13 is provided at an intermediate part. A plurality of linelike light emitting units 1 and the connectors 10 are prepared. Light emitting elements 6 of the units 1 are mounted at the mounts 13 of the connectors 10. The connectors 11 and second connectors 12 of the connectors 10 are connected, a plurality of the connectors 10 are connected. Thus, the units 1 can be connected to form a netlike state together with the connectors 10. In this manner, at the time of mounting at the tree, the elements 6 are prevented from being embedded in a shade of the leaves of the tree or directed in an undesired direction.