Tensegrity　principle　can　be　assumed　in　the　conceptual　design　of　footbridges.　Although　they　are　quite　deformable,　their　structural　behaviour　under　static　loads　is　quite　good.　The　dynamic　behaviour　is　also　quite　good,　but　vibrations　under　pedestrian　flow　have　to　be　controlled.　After　defining　feasible　constructional　types　and　their　detailing,　static　and　dynamic　analysis　are　performed.　Modal　analysis　has　been　carried　out　by　finite　element　method.　It　has　been　found　that　geometric　nonlinearity　would　greatly　influence　the　modal　analysis,　and　that　tensegrity　footbridges　with　arch　deck　have　better　dynamic　behaviour　than　those　with　straight　deck.　The　influence　of　the　dimensions　of　each　member　and　of　footbridge　geometry　on　bridge　behaviour　is　analysed.　Finally,　some　suggestions　about　structural　optimization　are　summarized.