PURPOSE: To enable placing of concrete for a huge dam, by a method wherein equipment has a tripper by which a concrete placing place is varied to an arbitrary position in the longitudinal direction of a conveyor, and a main conveyor, and a first auxiliary conveyor and second auxiliary conveyors, which are located under the main conveyor, are installed.

CONSTITUTION: A tripper 9 is mounted to a main conveyor 2, a first auxiliary conveyor 4 is located under the main conveyor, and ready mixed concrete is transferred to the conveyor 4. Thereafter, the ready mixed concrete is moved to either the second auxiliary conveyor 5 or 6 through a scraper 17 and a chute 18. The ready mixed concrete, being under conveyance in the direction of an arrow mark D, is scattered by means of a discharge body 22 consisting of a scraper 28 and a chute 29 and is placed over a vast area. This, although it is of simple constitution, enables placing of the concrete over a wide range, and permits a discharge place of the concrete to be selected in an arbitrary spot.