An electric component mounting structure comprising: a dash panel extending in a vehicle width direction; a cowl panel connected to an upper part of the dash panel and extending in the vehicle width direction; a side panel connected to end portions of the dash panel and the cowl panel in the vehicle width direction and extending in a vehicle front-rear direction and a vehicle up-down direction; a steering support member disposed behind the cowl panel and extending in the vehicle width direction; and a mounting bracket that attaches an electric component (11, 12) to a vehicle body, characterized in that the mounting bracket comprises: a body part to which the electric component (11, 12) is attached; a front leg part extending forward from the body part; an upper leg part extending upward from the body part; and a lower leg part extending downward from the body part, the cowl panel includes a front mounting point to which the front leg part is connected, the side panel includes an upper mounting point to which the upper leg part is connected and a lower mounting point to which the lower leg part is connected, the lower mounting point is disposed behind the front mounting point, the upper mounting point is disposed above the steering support member and behind the lower mounting point, and the upper leg part extends diagonally rearward and upward so as to be oriented rearward as the upper leg part goes upward in a side view of the vehicle. a dash panel extending in a vehicle width direction; a cowl panel connected to an upper part of the dash panel and extending in the vehicle width direction; a side panel connected to end portions of the dash panel and the cowl panel in the vehicle width direction and extending in a vehicle front-rear direction and a vehicle up-down direction; a steering support member disposed behind the cowl panel and extending in the vehicle width direction; and a mounting bracket that attaches an electric component (11, 12) to a vehicle body, characterized in that the mounting bracket comprises: a body part to which the electric component (11, 12) is attached; a front leg part extending forward from the body part; an upper leg part extending upward from the body part; and a lower leg part extending downward from the body part, the cowl panel includes a front mounting point to which the front leg part is connected, the side panel includes an upper mounting point to which the upper leg part is connected and a lower mounting point to which the lower leg part is connected, the lower mounting point is disposed behind the front mounting point, the upper mounting point is disposed above the steering support member and behind the lower mounting point, and the upper leg part extends diagonally rearward and upward so as to be oriented rearward as the upper leg part goes upward in a side view of the vehicle. a body part to which the electric component (11, 12) is attached; a front leg part extending forward from the body part; an upper leg part extending upward from the body part; and a lower leg part extending downward from the body part, the cowl panel includes a front mounting point to which the front leg part is connected, the side panel includes an upper mounting point to which the upper leg part is connected and a lower mounting point to which the lower leg part is connected, the lower mounting point is disposed behind the front mounting point, the upper mounting point is disposed above the steering support member and behind the lower mounting point, and the upper leg part extends diagonally rearward and upward so as to be oriented rearward as the upper leg part goes upward in a side view of the vehicle.