Semiconductor light emitting device

A semiconductor light emitting device comprising:

• a semiconductor light emitting element;
• and
• a conductive support component that supports the semiconductor light emitting element, wherein
• the conductive support component includes an electrically-conductive part and an insulating part,
• the electrically-conductive part includes a first electrically-conductive part and a second electrically-conductive part,
• the first electrically-conductive part is insulated from the second electrically-conductive part with interposition of the insulating part,
• the insulating part has an insulating main surface oriented toward a first side and an insulating back surface oriented toward a second side,
• the second side is opposite to the first side in a thickness direction,
• the first electrically-conductive part includes a first main surface part exposed from the insulating main surface,
• the second electrically-conductive part includes a second back surface part exposed from the insulating back surface,
• the first main surface part includes a first main surface base part on which the semiconductor light emitting element is mounted and a first main surface extending part extending from the first main surface base part in a first direction orthogonal to the thickness direction, and
• the first main surface extending part overlaps with the second back surface part as viewed in the thickness direction.