It depends how far back you want to go. The trackball, a very similar device, was first created in 1946 by Ralph Benjamin. Douglas Engelbart made the first mouse prototype sometime in the 1960s. However, a German company, Telefunken, demoed the first mouse publicly.
To our research we find that the first computer mouse was made out of Wood.
The computer mouse was created by Stamford Research Institute in California. The first mouse (built out of a block of wood) is on display in a case in their lobby.
mechanical mouse
The first computer mouse was invented in 1963-64 by a man named Douglas Engelbartas.
wood
Apple Lisa
XEROX
2025
same as now
XEROX Alto
Probably Douglas Engelbart, who invented the first mouse prototype in 1963.
Douglas Engelbart created the first mouse at Stanford Research Institute in1963.