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

Some associative submanifolds of the squashed 7-sphere