  In this article, notations are included in Section 1. In Section 2, we define
the grand Wiener amalgam space by using the classical Wiener amalgam space [9,
15, 16, 17] and the generalized grand Lebesgue space [18, 13] . Section 3,
concerns the inclusions between these spaces and some applications. In last
section Section 4, we prove the Holders inequality for grand Wiener amalgam
space. We also find the associate space and dual of this space, and we prove
that the grand Wiener amalgam space is not reflexive.
