The authors prove a Chen inequality involving the scalar curvature and a Chen-Ricci inequality for special contact slant submanifolds of Sasakian space forms. The inequalities are the contact versions of the inequalities obtained by the first author in [Result. Math. 55, No. 3–4, 457–468 (2009; Zbl 1180.53060)] and by both authors in [Taiwanese J. Math. 16, No. 2, 761–770 (2012; Zbl 1262.53051)], respectively.