To provide an automatic joining apparatus for wrapping materials for an automatic packaging machine wherein holes for gluing need not be bored at a tip of a wrapping material every time, and a spare wrapping material can be securely held in a ready state to be securely glued and connected with the wrapping material which is currently used.

The spare wrapping material 3F with a double face adhesive tape XY stuck to a surface is sucked to one of left and right suction plates 20, 21, which are oppositely provided, to be on standby. When an end mark of the wrapping material 2F currently used is detected, the left and right suction plates 20, 21 are in pushing contact with each other, so that the wrapping material 3F on standby with the double face adhesive tape XY is stuck and connected with the material 2F currently used.