Isolated avulsion lesser trochanteric fractures (LTF) are infrequent and happen mainly in adolescent athletes. LFT is a rare fracture the first case has been published by Schlueter et al. Avulsion fractures result when the fracture piece is pulled from its original bone by powerful contraction of a tendon or ligament. We report a case of boy patient with isolated avulsion fracture of the lesser trochanter confirmed by radiological investigation and patient underwent non-operative treatment. We present the first case diagnosed with LTF in our institution.