A process for preparing tertiary alcohol esters represented by the general formula: Z-C(-R2)2-O-C(=O)-R3 [wherein Z is a mono- or poly-cyclic aromatic or nonaromatic ring; R2 is a hydrocarbon group; and R3 is a hydrocarbon group or a heterocyclic group], which comprises reacting a carboxylic acid derivative represented by the general formula: Z-C(=O)-R1 [wherein R1 is halogeno or OR (wherein R is hydrogen or hydrocarbyl)] with an organometallic compound represented by the general formula: R2-M [wherein M is a metal atom optionally bearing a ligand, or MgY (wherein Y is halogeno)] and a carboxylic acid halide represented by the general formula: X-C(=O)-R3[wherein X is halogeno].