To provide an easy gradient slope construction designing a symbiotic relation with nature capable of executing slope greening, fishery formation, etc., without impairing revetment efficiency.

Drying solid clay blocks 3 mixed with plant seeds 6 are arranged to a position higher than the highest water level on a river revetment slope with an easy gradient. Porous ceramic blocks 4 are arranged at a position lower than the highest water level. The drying solid clay blocks 3 and ceramic blocks 4 are stored in a latticed frame body 2 formed by slope protection materials 1 mounted on the slope. Each of the slope protection materials 1 is connected with a connector.