Although companies frequently make great efforts to encourage workers to share knowledge and voice concerns, many workers intentionally choose to conceal their knowledge rather than share it. This ‘an intentional attempt by an individual to withhold or conceal knowledge that another person has requested” is called knowledge hiding. This review systematically reviews, categorises, and synthesises the current body of literature regarding knowledge hiding. The current literature is categorised based on methods, theories, research context, and geographical distribution. Secondly, the antecedents and outcomes of a KH across the different levels of analysis are mapped using an inductive approach. This thematic map offers a visual guide to KH, placing antecedents and outcomes at different levels of analysis and suggesting where future research in KH might be headed.