  Casimir forces of massive fermionic Dirac fields are calculated for parallel
plates geometry in spatial space with dimension d and imposing bag model
boundary conditions.It is shown that in the range of ma>>1 where m is mass of
fields quanta and a is the separation distance of the plates,it is equal to
massive bosonic fields Casimir force for each degree of freedom.We argue this
equality exists for any massive anyonic field in two-dimensional spatial
space.Also the ratio of massless fermionic field Casimir force to its bosonic
correspondent in d-dimentional spatial space is $(1-1/2^d)$.
