Pasir Panjang Pillbox is a concrete defensive structure in southwestern Singapore.In advance of the Japanese invasion of Malaya and Singapore during World War II, a number of concrete pillboxes were built along Singapore's eastern and western coasts. These pillboxes had machines guns installed that could fire in any direction. Typically oriented seaward, they were positioned at strategic intervals so that their fields of fire would overlap, thereby reinforcing each other and covering almost the entire southern coastline.
The machine gun pillbox at Pasir Panjang is one of the few that has survived to the present day. It lies within the area defended by the First Malaya Brigade, and may have been used by the Malay Regiment in their battle against the 18th Japanese Division on Pasir Panjang Ridge in February 1942.