A discharge device, comprising: a power source ; a discharge electrode having a plurality of discharge needles each being in a linear shape or a rod-like shape; and a counter electrode formed along the plurality of discharge needles , the discharge device providing a streamer discharge from a tip of each of the plurality of discharge needles toward the counter electrode as a result of receiving a potential difference applied to the discharge electrode and the counter electrode from the power source , wherein the plurality of discharge needles are arranged parallel to one another, the discharge electrode includes a plate portion which extends in an arrangement direction of the plurality of discharge needles , the plurality of discharge needles each in a rod-like shape protrude laterally from a side edge of the plate portion , and the discharge electrode includes an electrode support member , wherein the electrode support member includes an intermediate portion which is arranged opposite the counter electrode with the plate portion interposed between the intermediate portion and the counter electrode , characterized in that said intermediate portion extends along the plate portion , that it further comprises a pair of support portions which protrude from both ends of the intermediate portion to the plate portion , and support the plate portion , and that the intermediate portion is arranged parallel to the plate portion and is spaced from the plate portion . a power source ; a discharge electrode having a plurality of discharge needles each being in a linear shape or a rod-like shape; and a counter electrode formed along the plurality of discharge needles , the discharge device providing a streamer discharge from a tip of each of the plurality of discharge needles toward the counter electrode as a result of receiving a potential difference applied to the discharge electrode and the counter electrode from the power source , wherein the plurality of discharge needles are arranged parallel to one another, the discharge electrode includes a plate portion which extends in an arrangement direction of the plurality of discharge needles , the plurality of discharge needles each in a rod-like shape protrude laterally from a side edge of the plate portion , and the discharge electrode includes an electrode support member , wherein the electrode support member includes an intermediate portion which is arranged opposite the counter electrode with the plate portion interposed between the intermediate portion and the counter electrode , characterized in that said intermediate portion extends along the plate portion , that it further comprises a pair of support portions which protrude from both ends of the intermediate portion to the plate portion , and support the plate portion , and an intermediate portion which is arranged opposite the counter electrode with the plate portion interposed between the intermediate portion and the counter electrode , characterized in that said intermediate portion extends along the plate portion , that it further comprises a pair of support portions which protrude from both ends of the intermediate portion to the plate portion , and support the plate portion , and that the intermediate portion is arranged parallel to the plate portion and is spaced from the plate portion . <EOS>