Roll shade device

A roll shade device comprising:

• a fixed shaft which is fixed to a roof of a vehicle and extends in a vehicle width direction;
• a flexible rotation shaft into which the fixed shaft is inserted;
• a light shielding sheet whose first terminal end portion as a terminal end portion on one side is fixed to the rotation shaft, and which is in an unfolded state where light passing through a light transmitting portion provided to the roof is blocked or is in a winding state where light is allowed to pass according to movement of a second terminal end portion as a terminal end portion on an other side;
• and
• a torsion spring which is accommodated between the fixed shaft and the rotation shaft, which is in one of states including a state where a first leg portion of the torsion spring is hooked to a center of the fixed shaft in the vehicle width direction and a second leg portion of the torsion spring is hooked to a movable side spring holding member which is fixed to a tip end portion of the rotation shaft in the vehicle width direction so that the second leg portion is integrally rotated with the rotation shaft and a state where the first leg portion is hooked to a tip end portion of the fixed shaft in the vehicle width direction and the second leg portion is hooked to the movable side spring holding member fixed to a center of the rotation shaft in the vehicle width direction so as to be integrally rotated with the rotation shaft, and which biases the rotation shaft in a rotation direction in which the light shielding sheet is wound so that twist of the rotation shaft becomes symmetrical in the vehicle width direction.