Electrically operated parking brake apparatus

A parking brake apparatus, comprising:

• a pair of transmission members for transmitting a brake operating force to wheel brakes;
• an electric motor;
• a screw mechanism including a screw-threaded shaft adapted to be rotationally driven by said electric motor, and a nut member meshing with said screw-threaded shaft, said nut member being movable along said screw-threaded shaft by the rotation of said screw-threaded shaft;
• an equalizer having connecting portions connecting said pair of transmission members;
• and
• a pair of support shafts disposed at positions facing each other across said screw-threaded shaft for swingably supporting said equalizer on said nut member,
• wherein a common longitudinal axis of said pair of support shafts substantially passes through a center of said screw-threaded shaft, and a line connecting said connecting portions of said equalizer substantially passes through the center of said screw-threaded shaft.