The 2021 Men's EuroHockey Club Trophy I was the 44th edition of Europe's secondary men's club field hockey tournament organized by the European Hockey Federation and the first edition since it was renamed from the EuroHockey Club Trophy to the EuroHockey Club Trophy I.

It was held from 30 September to 3 October 2021 at Post SV Wien in Vienna, Austria.

Montrouge won their first title by defeating the hosts Post SV 5–0 in the final.

Rotweiss Wettingen won the bronze medal by defeating Stroitel Brest 4–3 in a shoot-out after the match finished 2–2.

Cardiff & Met and Western Wildcats withdrew before the tournament.