The present disclosure discloses an evaporative air cooler including a housing, an atomization part, and a cooling part. An accommodating cavity is arranged in the housing; a water storage tank is arranged at a bottom of the housing; the accommodating cavity is provided with an air inlet and an air outlet; the accommodating cavity communicating with the water storage tank; the atomization part includes an atomizer, and a water tank fixed to the housing; a first water storage cavity is arranged in the water tank; the atomizer is fixed to the water tank and placed in the accommodating cavity; the cooling part includes a wet curtain filter net and a fan which are fixed to the housing; the fan is arranged between the air inlet and the air outlet; and the wet curtain filter net being accommodated in the accommodating cavity and the water storage tank.