I think a simple google search will reveal the answer. There is a fairly detailed answer at Ask A Linguist; this is particularly nice because it examines some of the issues that make the question difficult to answer. Either Sumerian or Egyptian is the oldest written form, and that the answer for spoken languages is undefined. Yahoo takes a different approach to the question of written languages, and I think their answer is splendid. "All spoken languages today are equally old." The author also notes that Egyptian competes with Sumerian for the title of oldest written language. Wikipedia concentrates on written sources and asserts Sumerian.