This case report describes a clinical case of equine coital exanthema in a mare in Belgium. Several days following coitus, the mare showed typical lesions of coital exanthema consisting of papules, pustules and ulcers on the vaginal and vestibular region. The lesions healed within three weeks. The infection had no effect on fertility and gestation. The mare carried to term and delivered a healthy foal. Equine herpesvirus 3 was isolated from the lesions by means of virus isolation on an equine cell culture and subsequently identified by means of a PCR.