NOVELTY - The device (100) has a light emitting element (30) placed over a first groove part. A reinforcing portion (15) is placed on a site for joining regions on wiring portions, where the joining regions include the first joining region in which the first groove part and a second groove part are joined and a second joining region in which the first groove part and a third groove part are joined. The reinforcing portion surrounds a periphery of the element in a plan view of a substrate (10). An upper surface of the portion is located lower than an upper surface of the element.    USE - Light emitting device for display devices e.g. backlights of LCDs and TV-screens, for lighting applications.    ADVANTAGE - The light emitting element is protected by the reinforcing portion, so that stress can be prevented from concentrating between the light emitting element and the substrate when the substrate is bent. The light emitting element is placed on the reinforcing portion having high mechanical strength, so that defective mounting caused by inclination of the light emitting element can be prevented at time of mounting the light emitting element on the reinforcing portion by using an ultrasonic mounting method. The device is designed such that distance between the upper surface of the reinforcing portion and an upper surface of the base is smaller distance between the upper surface of the light emitting element and the upper surface of the base, so that light emitted from the light emitting element can be prevented from being blocked by the reinforcing portion. The device is designed such that outer edges of the first groove part and the second groove part can be respectively rounded or slanted to lateral direction, so that a reflective layer can be prevented from being damaged by a corner of a wiring portion. The device allows a part of the wiring portion to have recessed shape in a plan view for self-alignment of the light emitting element, so that preferable self-alignment of the light emitting element can be achieved. The device attaches a metal plate on an entire portion of the reinforcing portion placed on a back-surface of the substrate so as to improve strength against external force such as bending, and improve heat dissipating property of the device.    DETAILED DESCRIPTION - The substrate is a flexible elongated substrate. The reinforcing portion is an electrically conductive reinforcing portion.    DESCRIPTION OF DRAWING(S) - The drawing shows a plan view of a light emitting device.    Substrate (10)    Terminal portions (13)    Reinforcing portion (15)    Light emitting element (30)    Light emitting device (100)