Stress relaxation curves of pectin gels of 5.4-8.5% over the temperature range of about 9-25°C up to 2hr. have been obtained using a chainomatic balance relaxometer. Those curves were represented using a 6-elements mechanical model consisting of 3 Maxwell elements in parallel, and the following results are obtained.1) The instantaneous elastic modulus, E0, and the elastic constant, E1, of the Maxwell element with the longest relaxation time, τ1, are approximately proportional to C1·7 and C1·8, respectively, where C is (wt%) percentage of pectin.2) An apparent activation energy obtained from the temperature dependence of τ1 is a nearly constant value of about 7-8kcal/mol.From the results described above, it may be said that the concentrated pectin gel which was experimented by this author has a constant three dimensional network structure independent of its concentration.