The Four-banded Longhorn Beetle (Leptura quadrifasciata) can easily be confused with the Spotted Longhorn Beetle (Rutpela maculata).
The difference between the two is that Rutpela maculata has black-yellow ringed antennae and Leptura quadrifasciata has all black antennae (with the female having light brown antennae tips).

1st & 2nd photo: A female. Oostvaardersplassen, The Netherlands, 19 July 2021
3rd photo: A male. Naardermeer, Naarden, The Netherlands, 26 April 2014
4th photo: A male. In the company of Common Red Soldier Beetles. De Groote Peel National Park, The Netherlands, 11 July 2018
5th photo: A male. Landgoed Oostbroek, De Bilt, The Netherlands, 27 June 2023