A window up-and-down-winding-type shielding apparatus for a conveyance according to the invention includes: a pair of guide rails that are parallel to each other and that extend in an up-and-down direction; a moving member that is connected to a lower end of a shielding member and that can be moved in the up-and-down direction along the guide rails; a winding mechanism that has a rotation section for retractably winding the shielding member; a biasing force application means that applies a biasing force to the rotation section of the winding mechanism in a direction along which the shielding member is wounded; a motion conversion mechanism that converts the movement of the moving member in up-and-down direction along the guide rails to a rotational motion; and an axis member that is coordinated with motion conversion mechanism to have a rotational motion in accordance with the up-and-down movement of the moving member. This axis member is connected to a mechanism for switching a direction along which the rotative force is transmitted by which the rotation of the axis member in one direction is allowed and the rotation of the axis member in other directions is limited and the free rotation direction and the limited rotation direction can be switched.