The efficiency of geophysical methods for the aim of investigations of archaeological objects in the Holocene sediments are presented. The results obtained by authors in recent years are based on the research of three objects: o Kushmanskoye gorodische, X-XIII centuries, republic of Udmurtia; o Paleochannel of the Svir River, Leningrad region; o Buried military equipment and fortifications of the Great Patriotic War (island B. Tyuters, Gulf of Finland). The reasons of low informativity of some geophysical methods, revealed in a number of cases, despite the petrophysical prerequisites for their use, are discussed.