A rodent immobilizing apparatus for use during experimental procedures, dissection, and sample procurement. The apparatus has two (2) points of adherence to the dissection board, one at the head/jaw region and one at the tail region. Generally, the rodent immobilizing apparatus includes a base, a bed positioned atop the base, a bank disposed along one side of the bed, another bank disposed along the opposite side of the bed, a string/wire hook affixed to each bank with string/wire therebetween, and a tail clip/clamp positioned at an inferior portion of the bed. The bed is slidable along the banks to accommodate different sized rodents. In operation, an anesthetized/euthanized rodent is positioned supine on the bed. The bed slides along the banks, so that the string/wire is hooked within the rodents jaw. The tail is clamped to the bed, and the bed is pulled back to stretch out the rodent, thus immobilizing the rodent completely and rapidly.