The　structure-soil-structure　interaction　(SSSI)　problem　between　the　tunnel　and　its　adjacent　aboveground　building　is　investigated　by　using　a　2D　model　with　a　rigid　circular　tunnel　and　a　shear　wall　supported　by　a　semi-circular　rigid　foundation　embedded　in　a　homogenous　half-space.　The　analytical　solution　is　presented　for　the　model　system　response　under　the　SH-wave　excitation　based　on　the　wave　function　expansion　method.　The　analysis　fo-cuses　on　the　influence　of　the　SSSI　features　between　the　tunnel　and　its　adjacent　aboveground　building　on　the　system　response.　The　resonance　of　the　ground　structure　will　have　a　significant　effect　on　the　tunnel　response,　which　is　manifested　by　the　sudden　change　of　the　tunnel＇s　response　transfer　function　due　to　structural　resonance.　The　SSSI　effect　will　amplify　or　reduce　the　structural　relative　response　at　some　specific　frequencies　and　tunnel　-building　distances.　The　structural　relative　response　amplitude　can　be　amplified　by　about　40%　compared　to　that　of　the　single　structure.　The　group　effect　that　exists　in　the　interaction　of　multiple　ground　structures　does　not　necessarily　apply　to　the　tunnel-building　interaction.　The　results　in　this　paper　may　help　to　assess　the　impact　of　SSSI　effects　on　the　seismic　response　of　the　tunnel　and　its　aboveground　structure,　as　well　as　to　interpret　the　observed　seismic　responses.