Abstract: A portable lumbar cushion support attachment for backpacks for providing support to the lower spine and surrounding para-lumbar musculature of the wearer. The present invention is for a memory foam cushion which adjustably supports the lower spine in a proper position, alleviating lower back pain caused by improper posture and fatigue and also preventing further instances of lower back pain. In one embodiment, side straps are attached onto the bottom triangular strap regions of the backpack. The cushion is hemi-elliptical design which is positioned horizontally in the lower back region such that the cushion supports the spine and the surrounding musculature and the L1-L5 vertebrae. The cushion extends outwards, pushing against the lumbar spine, causing pressure to be created against the backpack and into the lower back, thus alleviating back pain and maintaining the lower back in its natural straight position.