The　existence　of　pore　water　has　great　influence　on　the　mechanical　properties　of　concrete,　such　as　effective　elastic　modulus　and　strength,　et　al.　Based　on　the　three-phase　sphere　model,　the　quantitative　relationship　between　the　bulk　modulus　of　saturated　concrete　and　porosity　was　derived.　The　effective　elastic　modulus　and　Poisson＇s　ratio　of　saturated　wet　concrete　were　deduced　without　considering　the　shear　capacity　of　the　pore　water.　According　to　the　maximum　tensile　stress　failure　criterion,　the　quantitative　relationship　between　porosity　and　effective　tensile　strength　and　tensile　peak-strain　of　saturated　concrete　were　presented　in　this　paper.　Theoretical　analysis　results　agree　well　with　Yaman＇s　experimental　results,　which　demonstrate　that　the　present　method　could　be　used　to　predict　the　elastic　modulus　of　saturated　concrete.　Besides,　it　is　found　from　the　analysis　results　that　the　presence　of　pore　water　make　the　effective　elastic　modulus　and　tensile　strength　of　saturated　concrete　improved　compared　with　dry　concrete.