Giant cell tumour is a benign aggressive bone tumour. Most commonly, it is seen in epiphysiometaphyseal region around knee and distal radius. Proximal ulna is a rare location for giant cell tumour. According to reports, only 4 such cases have been reported in English literature. We report one such case of giant cell tumour of proximal ulna. Patient presented with painless, progressive swelling around right elbow since 4 months. Proximal ulna along with tumour was resected and elbow was reconstructed using nonvascularized free fibular graft. At two years of follow-up, patient is tumour-free and has functional range of movement in elbow. We are reporting the case because of its rare location and for the indigenous treatment modality of using free fibular graft for elbow reconstruction.