A support comprises a board provided with multiple grooves on the upper face thereof, along which attachment brackets can be fitted for attaching movable control devices, pedals and similar devices on the board, allowing the different control devices to be attached by previously fixing the brackets on the grooves of the board at the required places and the subsequent fixed positioning of the control devices and pedals on the brackets, by means of attachment elements thereof. The grooves of the board have flanges along the upper edges thereof for holding the attachment elements of the brackets.