Replacement Expansion Joint for Cement is an expansion joint for use with concrete. The preferred embodiment of the invention utilizes an arrow shaped plastic expansion joint with two holes bored inside the expansion joint. To use the preferred embodiment of Replacement Expansion Joint For Cement, an individual would remove deteriorating wooden expansion joints located in grooves between concrete slabs. The length of the wooden expansion joints would be measured to permit the user to purchase and install the proper length of replacement expansion joint. The user would then insert the expansion joint of the present invention with the arrow side facing toward the ground into the groove from the wooden expansion joint. The newly installed expansion joint would be much more resistant to the weather elements than the wooden expansion joints. The triangular end would allow the expansion joints of the present invention easily to bore into the ground and the lips of the expansion joint of the present invention would keep the expansion joint in place.