  The squashed 7-sphere $S^{7}$ is a 7-sphere with an Einstein metric given by
the canonical variation and its cone $\mathbb{R}^{8} - \{ 0 \}$ has full
holonomy ${\rm Spin}(7)$. There is a canonical calibrating 4-form $\Phi$ on
$\mathbb{R}^{8} - \{ 0 \}$. A minimal 3-submanifold in $S^{7}$ is called
associative if its cone is calibrated by $\Phi$. In this paper, we classify two
types of fundamental associative submanifolds in the squashed $S^{7}$. One is
obtained by the intersection with a 4-plane and the other is homogeneous. Then
we study their infinitesimal associative deformations and explicitly show that
all of them are integrable.
