The present invention provides sheet material having good mechanical properties, flexibility, lightweight properties, and quality, and also relates to a production method therefor. The sheet material according to the present invention is one that includes, as constitutional components, an elastic polymer and nonwoven fabric composed mainly of ultrafine hollow fiber with an average monofilament diameter in the range of 0.05 to 10 µm, the ultrafine hollow fiber containing 2 to 60 hollows.