In view of the biological relevance of triazole‐based heterocyclic structures as antifungal, antiviral, and antitumor agents, we have synthesized a series of substituted pyrazolo[3,4‐d]‐1,2,3‐triazoles (2e–h, 2j, 4b) which we evaluated for their cytostatic and antiviral (HIV‐1 included) activity and for their capability to inhibit the multiplication of various human pathogenic fungi and bacteria. Moreover