Abstract: A synthetic resin holder in which a pair of embracing arms having inner ends connected by a hinge and outer ends butted in an opening and closing manner are integrally connected by hinges on opposite ends of a circular spring plate having a support leg projected in the central portion thereof, and when a connected portion between the embracing arms is moved outwardly from a border-line which connects both ends of the spring plate, the embracing arms are opened, and conversely, when it is moved inwardly, the arms are closed. The present invention provides such a holder as described which can solve the opening of the embracing arms of themselves due to the flexure of the spring plate resulting from the load, vibrations or shocks of an article being held, by the upward provision of the embracing arms along with the spring plate on the base plate.