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Constraints on the Earth's composition and on its radiogenic energy budgetcome from the detection of geoneutrinos. The KamLAND and Borexino experimentsrecently reported the geoneutrino flux, which reflects the amount anddistribution of U and Th inside the Earth. The KamLAND and Borexino experimentsrecently reported the geoneutrino flux, which reflects the amount anddistribution of U and Th inside the Earth. The JUNO neutrino experiment,designed as a 20 kton liquid scintillator detector, will be built in anunderground laboratory in South China about 53 km from the Yangjiang andTaishan nuclear power plants. Given the large detector mass and the intensereactor antineutrino flux, JUNO aims to collect high statistics antineutrinosignals from reactors but also to address the challenge of discriminating thegeoneutrino signal from the reactor background.The predicted geoneutrino signalat JUNO is 39.7 $^{+6.5}_{-5.2}$ TNU, based on the existing reference Earthmodel, with the dominant source of uncertainty coming from the modeling of thecompositional variability in the local upper crust that surrounds (out to$\sim$ 500 km) the detector. A special focus is dedicated to the 6{\deg} x4{\deg} Local Crust surrounding the detector which is estimated to contributefor the 44% of the signal. On the base of a worldwide reference model forreactor antineutrinos, the ratio between reactor antineutrino and geoneutrinosignals in the geoneutrino energy window is estimated to be 0.7 consideringreactors operating in year 2013 and reaches a value of 8.9 by adding thecontribution of the future nuclear power plants. In order to extract usefulinformation about the mantle's composition, a refinement of the abundance anddistribution of U and Th in the Local Crust is required, with particularattention to the geochemical characterization of the accessible upper crust.

Expected geoneutrino signal at JUNO