Several materials have been added to oil well cement slurries to improve their fresh and hardened properties. Many of these materials are industrial and agroindustrial wastes, and their use promotes sustainable development, avoiding their disposal in the environment. In this context, this study evaluates the rheological behaviour of oil well cement slurries containing granite cutting waste. The slurries were formulated with additions of 10%, 15%, and 20% of granite waste (by weight of cement-BWOC), as well as reference slurry containing only water and Portland cement. The results revealed that slurries containing up to 20% of granite waste presented satisfactory rheological properties, proving their potential for application in oil well cementing operations. Moreover, the addition of 20% of granite waste was not considered detrimental to the compressive strength of the cement slurries.