Intrabody　communication　(IBC)　technology　is　becoming　progressively　more　standardized　due　to　its　low　power　consumption　and　high　security　features　incorporated　into　the　third　physical　layer　of　the　IEEE　802.15.6　standard.　Even　then,　there　are　still　many　challenges　in　normalizing　the　measurement　issues　of　IBC.　A　major　concern　that　should　not　be　overlooked　is　the　electrodes　in　the　IBC,　especially　the　popular　use　of　gel　electrodes.　In　the　channel　measurements,　gel　electrodes　are　commonly　employed　to　improve　the　signal-to-noise　ratio　and　prevent　electrodes　from　falling　off.　In　this　paper,　a　comparative　study　of　the　electrical　properties　of　gel　was　investigated　during　the　measurement　of　human　channel　characteristics　and　to　clarify　the　differences　of　them.　Firstly,　the　basis　of　electrostatic　field　pole　plate　measurements　and　electromagnetic　theory　were　introduced　to　interpretate　how　the　relative　permittivity　and　conductivity　of　different　gels　will　influence　the　measurement　results.　Then　the　in　vivo　experiments　with　different　gel　or　dry　electrodes　were　performed　to　compare　the　differences　induced　by　the　gel.　The　results　indicate　that　the　influence　of　the　gel　on　the　human　channel　measurement　is　mainly　concentrated　below　400　kHz　(the　attenuation　is　reduced　by　16.7　dB　on　average),　and　the　stability　of　the　permittivity　and　conductivity　of　the　gel　has　a　direct　impact　on　the　stability　of　its　measurement　of　the　human　channel.　This　result　may　provide　a　meaningful　reference　for　the　standardization　of　electrode　usage　in　IBC.　©　2022　Journal　of　Beijing　Institute　of　Technology