Gastric carcinoid tumours are rare lesions but have been the focus of much scientific investigation. The incidence of gastric carcinoid appears to be increasing without a corresponding increase in survival, despite utilization of the latest available therapies. We present a case of 50 years old male who was diagnosed as gastric adenocarcinoma on endoscopic biopsy. Patient underwent palliative partial gastrectomy with transverse colectomy along with gastrojejunostomy and colostomy as tumour was invading transverse colon. Histopathology report of the specimen revealed malignant carcinoid of stomach extending into the serosa of transverse colon along with adenocarcinoma i.e. collision tumour. We discuss the presentation and treatment modalities of these tumours so that patients can be treated adequately.