Most thermoreversible gels have multiple junctions combining more than two network chains. The number of chains bound together in a single junction is called the multiplicity of the junction. On the basis of the Scanlan-Case criterion, the numbers of elastically effective chains and effective junctions in thermoreversible gels with multiple junctions are calculated as functions of the polymer concentration and the temperature for several important types of multiplicity distribution. It is found that the number of elastically effective chains increases as the cube of the concentration deviation near the sol/gel transition concentration and reaches an asymptotic high-concentration region where it increases proportionally to the concentration. The result is compared with the observed elastic moduli of associating polymers.