Humidity absorber that does not drip, occupies a small space and can be reused, usable both outdoors and indoors, comprising a bag that houses a sack that in turn contains a hygroscopic material, the bag being made of a 3D spacer material configuring a single cavity that houses the sack, provided with an opening having closing means, the opening allowing the sack to be introduced in the cavity or removed from the same such that the sack with hygroscopic material can be replaced to reuse the absorber.