A sign attachment device including a body portion for attaching a sign and an attachment portion whereby, the sign attachment device provides a means for enabling a sign to be secured to at least one support member.The body portion preferably has provided two parallel side walls which are adapted to be spaced apart by a prescribed distance to receive and hold the edge of a sign therebetween. The side wails preferably have provided at least one aperture which Is adapted to receive a securing member therethrough In order to secure a sign to the attachment device. It Is preferred that the side walls have at least one crest portion which Is adapted to accommodate the presence of a prong member positioned between said side walls. The attachment portion consists of two side portions divided by a living hinge so that the device can be attached to any shaped support.