To improve operation efficiency of a drying apparatus for supplying dried air to a drying section and a storage section in common grains drying equipment.

In a common grains drying equipment where there is provided a water pool section 7 such as a control pond and a water pool tank in a site, there is provided a heat exchanger 36 in an air intake port 35 of an air fan section 34 for supplying dried air to a grains drying storage section, and water in the water pool section 7 is circulated through said heat exchanger 36 whereby intake air from the air fan section 34 is heated with storage heat of the water pool section 7.