Wiktionary
confessional chair
n. A chair, or rather booth, in various constructional variations, typically in church or chapel, where the confessor, seated in one compartment, can privately (to protect the sacred secret of the sacrament) hear confession from the person in the other
Usage examples of "confessional chair".
As soon as she had taken her seat by the confessional chair, she made a confession of a hundred little nothings, and having finished her catalogue, stopped as if waiting for absolution.