Movable panel system comprising: A) an upper guide that extends along an axis (X-X) lying on a centreline plane having vertical extension identifying a first side and a second side, wherein the upper guide internally has a channel that has a lower opening; B) at least one panel operatively connected to the upper guide to slide along the axis (X-X) and, once arrived in a predefined rotational position, to rotate with respect to it about a vertical axis (Z-Z); C) a pair of trolleys, mutually spaced apart, housable in the housing channel fixed to the panel through the lower opening, comprising: i) a first trolley device that supports the panel in sliding and in rotation on the upper guide comprising two pairs of support and sliding wheels constituted by: - a first pair of vertical wheels each having a rotation axis (Y'-Y') perpendicular to the centreline plane, positioned in the first side; - a pair of horizontal wheels each having a rotation axis (Z'-Z') parallel to the centreline plane, positioned in the second side; ii) a second trolley device that supports the panel in sliding and that comprises a pair of support and sliding wheels constituted by a second pair of vertical wheels, with which the second trolley device is housed in the upper guide, and which have a rotation axis (Y"-Y") perpendicular to the centreline plane being positioned in the second side; wherein the upper guide identifies one packing end in which the panel is positionable and rotatable with respect to the upper guide, wherein in the packing end the upper guide has a lateral mouth traversable by the second trolley device in the rotation operations of the panel, wherein the lateral mouth comprises two inclined portions engageable by the second pair of vertical wheels in the traversing operations of the lateral mouth. A) an upper guide that extends along an axis (X-X) lying on a centreline plane having vertical extension identifying a first side and a second side, wherein the upper guide internally has a channel that has a lower opening; B) at least one panel operatively connected to the upper guide to slide along the axis (X-X) and, once arrived in a predefined rotational position, to rotate with respect to it about a vertical axis (Z-Z); C) a pair of trolleys, mutually spaced apart, housable in the housing channel fixed to the panel through the lower opening, comprising: i) a first trolley device that supports the panel in sliding and in rotation on the upper guide comprising two pairs of support and sliding wheels constituted by: - a first pair of vertical wheels each having a rotation axis (Y'-Y') perpendicular to the centreline plane, positioned in the first side; - a pair of horizontal wheels each having a rotation axis (Z'-Z') parallel to the centreline plane, positioned in the second side; ii) a second trolley device that supports the panel in sliding and that comprises a pair of support and sliding wheels constituted by a second pair of vertical wheels, with which the second trolley device is housed in the upper guide, and which have a rotation axis (Y"-Y") perpendicular to the centreline plane being positioned in the second side; wherein the upper guide identifies one packing end in which the panel is positionable and rotatable with respect to the upper guide, wherein in the packing end the upper guide has a lateral mouth traversable by the second trolley device in the rotation operations of the panel, wherein the lateral mouth comprises two inclined portions engageable by the second pair of vertical wheels in the traversing operations of the lateral mouth. i) a first trolley device that supports the panel in sliding and in rotation on the upper guide comprising two pairs of support and sliding wheels constituted by: - a first pair of vertical wheels each having a rotation axis (Y'-Y') perpendicular to the centreline plane, positioned in the first side; - a pair of horizontal wheels each having a rotation axis (Z'-Z') parallel to the centreline plane, positioned in the second side; - a first pair of vertical wheels each having a rotation axis (Y'-Y') perpendicular to the centreline plane, positioned in the first side; - a pair of horizontal wheels each having a rotation axis (Z'-Z') parallel to the centreline plane, positioned in the second side; ii) a second trolley device that supports the panel in sliding and that comprises a pair of support and sliding wheels constituted by a second pair of vertical wheels, with which the second trolley device is housed in the upper guide, and which have a rotation axis (Y"-Y") perpendicular to the centreline plane being positioned in the second side; wherein the upper guide identifies one packing end in which the panel is positionable and rotatable with respect to the upper guide, wherein in the packing end the upper guide has a lateral mouth traversable by the second trolley device in the rotation operations of the panel, wherein the lateral mouth comprises two inclined portions engageable by the second pair of vertical wheels in the traversing operations of the lateral mouth.