To provide kelly equipment which connects an excavation tool to rotate and lift the same and grips a pile to make the same rotatable for efficiently embedding a pile.

Kelly equipment is composed of a set of telescopic rods 7, 19, one being able to insert into the other slidingly each other. The innermost rod 9 supports an excavating tool, and a rotary table 1 vertically sliding along a guide mast of a operation machine supporting a kelly comprises means 8a for rotating the set of rods 7, 19 around the longitudinal axis thereof, means 10 for moving and recompressing the set of rods 7, 19, and means equipped with a motor for providing traction and thrust applied to the rods 7, 19 during excavation. In the kelly, at least a part of the rod 19 in the set of rods 7, 19 is completely located under the rotary table 1, which imparts rotation to the rods 7, 19.