This report investigates the impact of cultural diversity on organisational behaviour, focusing on a case study of H&M. It examines the importance of cultural diversity in the workplace, identifies strategies for managing cultural diversity within H&M, and analyses the impact of cultural diversity on organisational behaviour. The research employs a deductive approach and quantitative methods, utilising primary data collected through questionnaires distributed to 30 respondents. The findings reveal insights into the benefits and challenges of cultural diversity, including its influence on reputation, opportunities for workers, profitability, communication, and employee engagement. The report concludes with recommendations for H&M to enhance their diversity management practices and foster a more inclusive working environment.