  We calculate the supersymmetric QCD corrections in order $\alpha_s$ to the
decays $\squark_i \to q' \chargino_j$ (i,j = 1,2) and $\squark_i \to q
\neutralino_k$ (k = 1,...4) within the Minimal Supersymmetric Standard Model.
In particular we consider the decays of squarks of the third generation,
$\stop_i$ and $\sbottom_i$ (i = 1,2), where the left--right mixing must be
taken into account. The corrections turn out to be of about 10\%, except for
higgsino--like charginos or neutralinos, where they can go up to 40\%.
