A car device for an elevator, comprising: a cage comprising left and right wing walls (25a, 25b), and a sill; at least one door panel (3a, 3b) for opening/closing a doorway of the cage; a driving mechanism for driving the at least one door panel (3a,3b) so that the at least one door panel (3a, 3b) is opened/closed; and a door frame for supporting the at least one door panel (3a,3b) and the driving mechanism, wherein the door frame comprises a single-piece frame comprising: a support portion supporting the at least one door panel (3a, 3b) and the driving mechanism, wherein the support portion corresponds to an upper part of the door frame; and a top-plate portion, which corresponds to a lower part of the door frame, located above the left and right wing walls (25a, 25b) and above the doorway which is defined by the top-plate portion in cooperation with the left and right wing walls (25a, 25b) and the sill, wherein the top-plate portion constitutes a front wall together with the right and left wing walls (25a, 25b), wherein the support portion comprises a door rail portion which is a projecting shape toward a landing side of the elevator such that a clearance (Df) between the door panels (3a, 3b) and the top-plate portion has a desired size and a clearance (Dw) between the door panels (3a, 3b) and the wing walls (25a, 25b) has a desired size, wherein the door rail portion comprises upper and lower support surfaces (33a, 33b) extending substantially in parallel to each other for guiding and supporting hanger rollers (35a, 35b) and upthrust rollers (37a, 37b) rotatably provided to the door panels (3a, 3b), wherein the lower support surface is a horizontal surface, wherein a portion of a ceiling, which similarly extends horizontally, is over-lapped with the horizontal surface of the lower support surface, wherein the overlapped surfaces are coupled by a fastener to fix the door frame. a cage comprising left and right wing walls (25a, 25b), and a sill; at least one door panel (3a, 3b) for opening/closing a doorway of the cage; a driving mechanism for driving the at least one door panel (3a,3b) so that the at least one door panel (3a, 3b) is opened/closed; and a door frame for supporting the at least one door panel (3a,3b) and the driving mechanism, wherein the door frame comprises a single-piece frame comprising: a support portion supporting the at least one door panel (3a, 3b) and the driving mechanism, wherein the support portion corresponds to an upper part of the door frame; and a top-plate portion, which corresponds to a lower part of the door frame, located above the left and right wing walls (25a, 25b) and above the doorway which is defined by the top-plate portion in cooperation with the left and right wing walls (25a, 25b) and the sill, wherein the top-plate portion constitutes a front wall together with the right and left wing walls (25a, 25b), a support portion supporting the at least one door panel (3a, 3b) and the driving mechanism, wherein the support portion corresponds to an upper part of the door frame; and a top-plate portion, which corresponds to a lower part of the door frame, located above the left and right wing walls (25a, 25b) and above the doorway which is defined by the top-plate portion in cooperation with the left and right wing walls (25a, 25b) and the sill, wherein the top-plate portion constitutes a front wall together with the right and left wing walls (25a, 25b), wherein the support portion comprises a door rail portion which is a projecting shape toward a landing side of the elevator such that a clearance (Df) between the door panels (3a, 3b) and the top-plate portion has a desired size and a clearance (Dw) between the door panels (3a, 3b) and the wing walls (25a, 25b) has a desired size, wherein the door rail portion comprises upper and lower support surfaces (33a, 33b) extending substantially in parallel to each other for guiding and supporting hanger rollers (35a, 35b) and upthrust rollers (37a, 37b) rotatably provided to the door panels (3a, 3b), wherein the lower support surface is a horizontal surface, wherein a portion of a ceiling, which similarly extends horizontally, is over-lapped with the horizontal surface of the lower support surface, wherein the overlapped surfaces are coupled by a fastener to fix the door frame.