In　general,　due　to　their　geological　formation　by　deposition,　natural　stiff　clays　exhibit　anisotropic　thermo-hydromechanical　behaviour.　This　behaviour　is　important　to　be　considered　in　geological　and　geo-environmental　engineering.　In　this　study,　natural　stiff　Teguline　clay　was　extracted　at　different　depths　and　the　thermal　conductivity,　compressibility　and　hydraulic　conductivity　were　determined　on　samples　along　various　orientations　with　respect　to　the　bedding　plane.　Significant　thermal　and　hydraulic　conductivity　anisotropies　were　evidenced　with　higher　values　along　the　bedding　plane,　indicating　that　both　heat　and　water　transfers　preferentially　occurred　along　the　direction　parallel　to　the　bedding　plane.　Moreover,　the　compression　index　in　the　horizontal　direction　were　found　lower　than　in　the　vertical　direction,　while　opposite　phenomenon　was　observed　for　the　yield　stress.　The　degrees　of　thermal　conductivity　anisotropy　eta(T),　compression　index　anisotropy　eta(Cc1),　yield　stress　anisotropy　eta(oy)　and　hydraulic　conductivity　anisotropy　eta(k1)　were　found　comparable,　indicating　that　bedding　is　a　good　indicator　of　the　inherent　thereto-hydro-mechanical　anisotropy　for　natural　stiff　clays.　Upon　loading　in　oedometer　after　the　yield　stress,　the　inherent　anisotropy　changed:　for　the　vertical　sample　(loading　direction　normal　to　the　bedding　plane),　loading　led　to　more　and　more　anisotropy,　while　for　the　horizontal　sample　(loading　direction　parallel　to　the　bedding　plane),　the　inherent　anisotropy　disappeared　first;　then,　the　induced　anisotropy　was　developed.　These　findings　provided　useful　information　for　analyzing　the　thermo-hydro-mechanical　anisotropy　of　natural　soils　in　geotechnical　and　geo-environmental　engineering.