A gondola apparatus to be used for maintenance of a blade in an aerogenerator including a columnar tower, a nacelle provided on the tower, and the blade rotatably provided to the nacelle, the aerogenerator being configured to rotate the blade to operate a generator, the gondola apparatus comprising: a front scaffold frame horizontally extending in a direction crossing the tower, the front scaffold frame facing a back of the blade; a first side scaffold frame horizontally movably attached to the front scaffold frame, the first side scaffold frame facing a side surface of the blade; a second side scaffold frame horizontally movably attached to the front scaffold frame, the second side scaffold frame facing a side surface of the blade; a stabilizing member attached over both sides of the front scaffold frame such that the stabilizing member is extendable and contractable to the tower, the stabilizing member abutting on an outer surface of the tower; a first lifting device provided to the front scaffold frame; a second lifting device attached to the first side scaffold frame such that the second lifting device is rockable; a third lifting device attached to the second side scaffold frame such that the third lifting device is rockable; a first drive device provided to the front scaffold frame, the first drive device being configured to horizontally drive the first side scaffold frame; a second drive device provided to the front scaffold frame, the second drive device being configured to horizontally drive the second side scaffold frame; a first traction rope provided between the first lifting device and an origin on a side of the nacelle; a second traction rope provided between the second lifting device and the origin on the side of the nacelle; and a third traction rope provided between the third lifting device and the origin on the side of the nacelle. a front scaffold frame horizontally extending in a direction crossing the tower, the front scaffold frame facing a back of the blade; a first side scaffold frame horizontally movably attached to the front scaffold frame, the first side scaffold frame facing a side surface of the blade; a second side scaffold frame horizontally movably attached to the front scaffold frame, the second side scaffold frame facing a side surface of the blade; a stabilizing member attached over both sides of the front scaffold frame such that the stabilizing member is extendable and contractable to the tower, the stabilizing member abutting on an outer surface of the tower; a first lifting device provided to the front scaffold frame; a second lifting device attached to the first side scaffold frame such that the second lifting device is rockable; a third lifting device attached to the second side scaffold frame such that the third lifting device is rockable; a first drive device provided to the front scaffold frame, the first drive device being configured to horizontally drive the first side scaffold frame; a second drive device provided to the front scaffold frame, the second drive device being configured to horizontally drive the second side scaffold frame; a first traction rope provided between the first lifting device and an origin on a side of the nacelle; a second traction rope provided between the second lifting device and the origin on the side of the nacelle; and a third traction rope provided between the third lifting device and the origin on the side of the nacelle.