A clamping structure for umbilical cord includes a body formed as bar shaped. The lateral surface of the body includes a rack section formed by engaging teeth distantly and straightly aligned. The rack section further includes sharp teeth protruded from the lateral surface. A head portion is assembled to one of two ends of the body and a buckling hole is defined thereon. An engaging structure is assembled in the buckling hole, and a recessed rail is disposed at the engaging structure. When the other end of the body is inserted into the buckling hole, the body forms a ring with the lateral surface defined as an inner wall thereof, the engaging teeth are engaged with the engaging structure, and each sharp teeth is extended toward an interior of the ring to pass through the recessed rail so as to fasten an umbilical cord securely.
