An oligonucleotide of triazole‐linked RNA (TLRNA) was synthesized by performing consecutive copper‐catalyzed azide‐alkyne cycloaddition reactions for elongation. The reaction conditions that had been optimized for the synthesis of 3‐mer TLRNA were found to be inappropriate for longer oligonucleotides, and the conditions were reoptimized for the solid‐phase synthesis of an 11‐mer TLRNA oligonucleotide. Duplex formation of the 11‐mer TLRNA oligonucleotide was examined with the complementary oligonucleotide of natural RNA to reveal the effects of the 2′‐OH groups on the duplex stability.