Discharge lamp and lamp unit

摘要

A discharge lamp includes a luminous bulb in which a luminous material is enclosed and a pair of electrodes are opposed in the luminous bulb; and a pair of sealing portions for sealing a pair of metal foils electrically connected to the pair of electrodes, respectively. At least one of the pair of sealing portions is provided with at least one constricted portion whose length in a thickness direction of the metal foil in the sealing portion is smaller than that of other portions in the sealing portion.