Shutter unit and image pickup apparatus

An image pickup apparatus comprising:

• a shutter unit;
• and
• an image sensor configured to photoelectrically convert an optical image formed via an image pickup optical system,
• wherein the shutter unit includes:
• a base plate on which an opening is formed;
• a first blade member configured to be movable between a closed state in which the first blade member closes the opening and a retracted state in which the first blade member retracts from the opening;
• a first driving member configured to be biased in a first direction by a first biasing member;
• a second driving member configured to be biased by a second biasing member in a second direction opposite to the first direction;
• a first charging member configured to cause the first driving member to move in the second direction against a biasing force on the first driving member of the first biasing member;
• a second charging member configured to cause the second driving member to move in the first direction against a biasing force on the second driving member of the second biasing member;
• and
• a motor configured to supply a driving force to the first charging member and the second charging member,
• wherein in a case where the first charging member causes the first driving member to move, the motor rotates in a direction opposite to a rotation direction in a case where the second charging member causes the second driving member to move.