To provide a fresh water-generating apparatus that does not require large amounts of heating energy as in the past, also does not require maintenance such as replacement of reverse osmosis membranes, and is simpler and inexpensive.[Solution] A fresh water-generating apparatus is configured from: a first porous water-absorbing substrate 3, each hole diameter of the porous structure that is immersed in a stored liquid 4 stored in a first storage tank 1 being formed in the size of a water molecule; a blower 6 for blowing air on the upper end of the first porous water-absorbing substrate 3; a second porous water-absorbing substrate 7 for catching water vapor, which is vaporized from the upper end of the first porous water-absorbing substrate 3 by the air flow from the blower 6 and is blown out, on the front surface thereof; a storage tank 2 for storing water that condenses inside the second porous water-absorbing substrate 7 and drips from the lower part of the second porous water-absorbing substrate 7; and a guide pipe 8 for connecting air that is sent out and discharged from the second porous water-absorbing substrate 7 to the air intake side of the blower 6.