The present invention relates to spikes for golf shoes that ensure stability while walking and a sufficient gripping force for any green surface on a golf course, and that will never damage a delicate green surface such as a putting green. The spike for golf shoes is characterized by comprising a plurality of leg portions (2) extending downward from a spike main body (1), and a rounded bulge (B) formed on the front-end of each leg portion (2), wherein there will be no sharp portion produced in a bulge (B) even if the bulge (B) wears out.