It is shown that the detector and antenna parts of an uncooled terahertz receiver based on submillimeter and nanometer resonance structures in the form of spiral fragments and microresonators in the form of round holes enable one to obtain a reflection loss of -24.29 dB, a standing-wave ratio of 1.13 and a conversion efficiency of 99.63%. The wide range of potential possibilities of the practical use of terahertz radiation is due to the fact that the individ- ual frequencies of molecules of any material lie precisely in the gap between the radio-frequency and optical bands. For prac- tical applications of terahertz technology, highly sensitive, simple, reliable and cheap radiation receivers are required. Recently, ways of constructing such receivers based on artificial media, belonging to the class of composite metamaterials, have been actively investigated. These electromagnetic materials, which contain elements of special form with dimensions that are small compared with the wavelength of the electromagnetic radiation and which are capable of exciting electric cur- rents, possess unique electrical, radio and optical properties, not possessed by natural materials. These properties depend on the resonance interaction of an electromagnetic wave with a heterogeneous medium, consisting of a mass of artificial reso- nance elements, which sense the radiation as a continuous electromagnetic medium (1-4). The purpose of this paper is to develop and investigate one of the possible ways of constructing an integrated uncooled terahertz receiver, the detector and antenna parts of which are based on submillimeter and nanometer resonance structures in the form of spiral fragments and microresonators in the form of round holes. The constructional form of the proposed integrated uncooled receiver is shown in Fig. 1. Arrays of left spiral frag- ments 2 and right spiral fragments 7 are formed directly on a substrate 1 in a strict geometrical order, along the trajectory of a log-periodic spiral. Output leads 3 are constructed in the form of a two-arm Archimedes spiral. An absorber 4 contains microresonators 6 - four circular fragments - and are situated on heat-sensitive element 5, along the perimeter of which the spiral fragments 2 and 7 are arranged in a certain order. We used the Ansoft HFSS v. 12 software for a computer investigation of the expected fundamental parameters and characteristics of the terahertz radiation receiver. The numerical package of three-dimensional electrodynamic modeling for solving Maxwell's equations is based on the finite element method with tetrahedral subdivision of the model, which enables the electromagnetic field distribution to be calculated and is a reliable instrument for developing highly effective components (5, 6). Each element of the subdivision grid can be made separately from any material of the database, which provides the possibility of analyzing complex structures with different electrodynamic parameters. A numerical calculation of the integrated uncooled receiver was carried out taking the boundary conditions into account, namely, no reflected waves in a limited volume of open space and an input electromagnetic radiation power of 1 mW. The source of electromagnetic radiation was a wave port, placed parallel to the plane of the receiver. The minimum distance