A light emitting device includes a substrate member and at least one light emitting element. The substrate member has a groove portion defined between two wiring portions spaced apart from each other. The groove portion includes a first groove portion, a second groove portion, and a third groove portion. The first groove portion extends in a direction that forms a slanted angle with respect to a first direction, the second groove portion is spaced apart from the first groove and extends in a direction that forms a slanted angle with respect to the first direction, and the third groove portion is interconnected with the first groove portion and the second groove portion. The light emitting element is disposed over the third groove portion.