To provide a light-emitting element which emits light, even without the use of power supply, fuel, or chemical light-emitting material.

This is a stress-induced light-emitting element 10 comprises a light transmissible wall member (or capsule) 20 having a spherical shape or the like and having a space 40 surrounded by a wall and a shell, one or a plurality of particle shaped members 30 movably arranged at the space 40, and a stress-induced light-emitting material which emits light by a mechanical stimulus (addition of mechanical energy) contained in the wall member 20 and/or the particle shaped members 30. For example, by fixing a grip 50 to the stress-induced light-emitting element 10, and swinging S right and left or rotating R the stress-induced light-emitting element 10 manually by gripping the grip 50 by hand, mutual particle shaped members 30 or the particle shaped members 30 and the wall member 20 mutually collide or rub, and the stress-induced light-emitting element 10 flashingly emits a light L by this mechanical stimulus, and the light is emitted from the light transmitting wall member 20. In order to give the mechanical stimulus to the stress-induced light-emitting element 10, apart from manual operation, a man-made mechanical energy applying means, such as a voltage vibrator, can be used.