X-linked agammaglobulinemia and isolated growth hormone deficiency was first described in 1980 and then classified as a different primary immune deficiency. Delayed puberty in patients with X-linked agammaglobulinemia may result in delayed secretion of growth hormone (GH). To determine true isolated growth hormone deficiency. GH stimulation tests and other hypophyseal hormone evaluations must be performed. In this paper, we report a 15-year-old boy with X-linked agammaglobulinemia and isolated growth hormone deficiency, and review related literature.