The article sets out the main trends, strategies and methods for preve
ntive conservation of library collections. Preventive conservation is
defined more as a global approach - almost a state of mind - rather th
an a discipline with clearly defined boundaries. Emphasis is laid on t
he necessary cooperation between the various departments within a libr
ary, on the training of staff and readers and on raising awareness amo
ng political authorities of conservation of the heritage. In order to
reconcile the two basically contrasting tasks of preservation of docum
ents and access to information, it is vital to provide libraries with
sufficient financial resources for the preservation of their collectio
ns.