A spot welding electrode housing apparatus capable of housing a plurality of electrodes for spot welding, the spot welding electrode housing apparatus comprising: a housing case including a first side surface portion and a second side surface portion that are opposed to each other in the horizontal direction orthogonal to the longitudinal direction of the housing case, a surface portion connecting upper edges of the first side surface portion and the second side surface portion together, and a back surface portion connecting lower edges of the first side surface portion and the second side surface portion together, wherein a portion surrounded by the first side surface portion, the second side surface portion, the surface portion, and the back surface portion serves as a linear housing path having an electrode outlet port, wherein a shank entrance is formed at a longitudinal end of the surface portion as a notch that is open at the longitudinal end of the surface portion and is continuous to the electrode outlet port, the housing path being capable of housing the electrodes in a state where the electrodes are arranged linearly in a direction orthogonal to center axes of the electrodes and fitting recesses of the electrodes to be fitted on a distal end of a shank of a welding gun are arranged in parallel and are open in the direction of the surface portion, the electrode outlet port communicating with the housing path and being disposed at an end of the housing case; a pressing part that presses one or a plurality of parallel electrodes housed in the housing path toward an end of the housing path; a lever member supported by the housing case to be swingable about a swing shaft extending in a direction identical to the center axes of the electrodes housed in the housing path, a position of the lever member being changeable between a first position in which the lever member swings to one side to have a distal end cover a part of the electrode outlet port and a second position in which the lever member swings to another side to have the distal end expose the electrode outlet port, the apparatus being characterised by a biasing part disposed between a proximal end of the lever member and a side surface of the housing case and configured to bias the proximal end of the lever member to a direction away from the housing case so that the lever member swings to the one side, and in that the lever member has a curved portion that is formed at the side of the distal end of the lever member facing the housing path and corresponds to associated one of outer peripheral surfaces of the electrodes, wherein the curved portion is configured to contact associated one of the outer peripheral surfaces of the electrodes and press the associated one of the electrodes against an inner surface of the second side surface portion of the housing case when the lever member swings to the one side. a housing case including a first side surface portion and a second side surface portion that are opposed to each other in the horizontal direction orthogonal to the longitudinal direction of the housing case, a surface portion connecting upper edges of the first side surface portion and the second side surface portion together, and a back surface portion connecting lower edges of the first side surface portion and the second side surface portion together, wherein a portion surrounded by the first side surface portion, the second side surface portion, the surface portion, and the back surface portion serves as a linear housing path having an electrode outlet port, wherein a shank entrance is formed at a longitudinal end of the surface portion as a notch that is open at the longitudinal end of the surface portion and is continuous to the electrode outlet port, the housing path being capable of housing the electrodes in a state where the electrodes are arranged linearly in a direction orthogonal to center axes of the electrodes and fitting recesses of the electrodes to be fitted on a distal end of a shank of a welding gun are arranged in parallel and are open in the direction of the surface portion, the electrode outlet port communicating with the housing path and being disposed at an end of the housing case; a pressing part that presses one or a plurality of parallel electrodes housed in the housing path toward an end of the housing path; a lever member supported by the housing case to be swingable about a swing shaft extending in a direction identical to the center axes of the electrodes housed in the housing path, a position of the lever member being changeable between a first position in which the lever member swings to one side to have a distal end cover a part of the electrode outlet port and a second position in which the lever member swings to another side to have the distal end expose the electrode outlet port, the apparatus being characterised by a biasing part disposed between a proximal end of the lever member and a side surface of the housing case and configured to bias the proximal end of the lever member to a direction away from the housing case so that the lever member swings to the one side, and in that the lever member has a curved portion that is formed at the side of the distal end of the lever member facing the housing path and corresponds to associated one of outer peripheral surfaces of the electrodes, wherein the curved portion is configured to contact associated one of the outer peripheral surfaces of the electrodes and press the associated one of the electrodes against an inner surface of the second side surface portion of the housing case when the lever member swings to the one side.