Background: Childhood malignancies are becoming an emerging paediatric problem in Bangladesh. They are very much different from adult malignancy in their nature and distribution. This is a seven years retrospective study on patterns of childhood solid malignant tumours in paediatric surgery department of Mymensingh Medical College Hospital. Objectives: The objective of this study is to determine the types of malignant patients admitted in the paediatric surgery department of Mymensingh Medical College Hospital during the study period and also their age and sex distribution. Methods: This is a retrospective study of seven years duration from January 2017 to December 2023 in paediatric surgery department of Mymensingh Medical College Hospital. All admitted patients having solid malignant tumour aged up to 15 years diagnosed by means of histological or cytological study were included in this study. Results: 100 solid malignant tumour patients were admitted during the study period. 68% patients were male and 32% patients were female, with a male female ratio of 2.1:1.69 patients (69%) were below 5 years of age and 31(31%) patients were between 5 to 15 years of age. In this study, Wilms' tumour or Nephroblastoma was the most prevalent malignant tumour, that was 40 in number (40%), followed by Neuroblastoma 28(28%), Lymphoma in abdominal site 12 (12%), Testicular tumour 9(9%), malignant sacrococcygeal teratoma 5(5%), Rhabdomyosarcoma 3(3%), Hepatoblastoma 2(2%) and one malignant gastric teratoma. Conclusion: From this study it was found that, Wilms' tumour is the most common Paediatric solid malignancy. Malignant gastric teratoma can rarely occur in paediatric age group.