The title complex (2) has been synthesized from the reaction of (η5-C5Me5)Ir(CO)2 (1) with AgBF4. Complex 2 crystallizes in the monoclinic space group P21/c with a = 12.355(2) Å, b = 13.713(2) Å, c = 16.672(3) Å, β = 97.70(1)°, and Z = 4. The structure was solved by using 3131 observed reflections (I ≥ 2.5σ(I)) in the range 0° < 2θ < 50° to final discrepancy indices of RF = 0.032 and RwF = 0.038. The cation may be described as consisting of two molecules of 1 bound to Ag+ by donor–acceptor Ir → Ag bonds. The Ir—Ag—Ir skeleton is nearly linear (angle 173.67(6)°). The Ag—Ir bond lengths are equal (2.659(1) Å), and the two molecules of 1 are disposed mutually trans, to give the cation approximate (noncrystallographic) C2h symmetry. Keywords: complex, iridium, silver, metal-metal bond, X-ray, crystal, structure, carbonyl, donor-acceptor, pentamethylcyclopentadienyl.