In this paper we have calculated analytically the magnetostatic interaction between two wire-tube nanostructures as a function of their magnetic and geometric parameters. As expected, the interaction energy increases as the nanostructures approach, but interestingly when the nanostructures are close enough, a nonmonotonic behavior with the wire-tube portions is reported. Besides, we investigate the hysteresis loop for two interacting Ni81Fe19 wire-tube nanostructures by micromagnetic simulations in order to study how the interaction affects the magnetic properties of these nanostructures. This work allows for the study of magnetostatic interactions between wire-tube nanostructures that have been proposed as an interesting alternative to store information or even perform logic functions, because to their ability to pin a domain wall.428452456Fondecyt [1150952]DICYT from VRIDEI-USACH [041631EM-POSTDOC]Financiamiento Basal para Centros Cientificos y Tecnologicos de Excelencia [FB0807]Brazilian funding agency CENAPAD-SP [proj588 dsalazar]