Purpose: a school bag is arranged to prevent student's injury from the traffic accident of the installation by a light emitting diode to a suitable position of school bag. Construction: school bag includes the light emitting diode (2) and a power switch (3) in a position (4) for light emitting diode, a position (5) for the power switch on an epaulet of school bag. By turning on the power switch, light emitting diode consumingly shines, so that driver of vehicle pays attention to emitting light to guide safe driving, thus from the preventing student from traffic accident injury. The position of light emitting diode and power switch is transformed into the other positions being easily seen from driver and by hand operation.
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