After the devastating earthquake in Petrinja on December 29, 2020, the question arises as to whether the residents of Croatia were sufficiently prepared. Earthquakes can have serious consequences, so it is important to understand what predicts people's intention to prepare. Previous research has shown insufficient levels of preparedness for natural disasters. Given the seismic activity in Croatia, it is important for citizens to be aware of the potential threat of earthquakes and take appropriate preparatory measures. However, in order for organizations responsible for protecting the population to know how to motivate citizens towards behaviors that can potentially protect them, it is important to understand what motivates people to prepare for such natural disasters. The Theory of Planned Behavior (Ajzen, 2008) is an influential theory used to predict human behavior. According to this theory, behavioral intention is a key predictor of actual behavior, and behavioral intention is determined by attitudes, subjective norms, and perceived behavioral control. This theory is often applied in research related to people's preparedness for natural disasters, including earthquakes. Therefore, the aim of this study is to examine whether attitude, subjective norms, and perceived behavioral control predict the behavioral intention to prepare for earthquakes in men and women. The measurement instruments used in the study were developed specifically for the research based on the guidelines of Ajzen and Fishbein (2010) for for constructing measures of variables from the framework of the Theory of Planned Behavior. The results showed that a positive attitude towards earthquake preparedness and subjective norms supporting earthquake preparedness significantly predict the intention to prepare for earthquakes in both men and women.