Since　communication　in　a　wearable　network　may　not　always　be　conducted　over　direct　but　multihop　connections,　intermediate　nodes　that　make　up　the　connections　for　communication　could　become　potential　sources　of　security　threats.　Therefore,　access　authentication　is　very　crucial　for　preventing　illegitimate,　unauthorized　or　insecure　devices　from　making　access　to　the　network.　In　this　paper,　we　propose　a　new　mutual　authentication　protocol　in　wireless　wearable　networks　based　on　several　technologies　such　as　ad　hoc　network　model,　ECC,　(t,　n)　threshold　cryptographic　method,　EAP　and　TPM　so　that　both　the　user　and　the　terminal　device　can　be　authenticated　before　access　to　the　network　is　allowed.　Thus,　only　a　trusted　terminal　with　a　legitimate　user　can　be　allowed　to　access　a　wearable　network.　We　also　show　the　effectiveness　of　our　authentication　protocol　through　mathematical　analysis　and　simulation　and　compare　our　protocol　with　a　generic　protocol　without　TPM　to　demonstrate　the　advantages　of　our　protocol　not　only　in　terms　of　security　but　also　in　terms　of　computation　overhead.