Results of the controlled source radiomagnetotellurics (CSRMT) with a horizontal electric dipole source and the electric resistivity tomography (ERT), obtained in a permafrost area in the Vorkuta region (Russia) are presented. The results of different inversion options compared: (1) isotropic 1D inversion of CSRMT data, (2) isotropic 2D inversion of separate CSRMT and ERT data, (3) joint anisotropic 1D inversion of CSRMT and ERT data. Based on results of the joint anisotropic inversion, a significant resistivity anisotropy of frozen Quaternary clayey sediments with the thickness up to 20 m in the upper parts of sections was revealed and the parameters (horizontal and vertical resistivity and anisotropy coefficient) were determined. In the resistivity sections obtained from the ERT data, the thickness of anisotropic layer is significantly overestimated. As a result, the earlier determined permafrost thickness in this area (more than 40 m) obtained from ERT data was clarified.