The purpose of this research was to formulate and evaluate a model of behavioral and attitudinal variables for predicting career adaptability which is assumed as a major developmental task for early adulthood workers. A multistage path model proposed a priori was constructed using the following eight variables. The six exogenous variables were awareness on own responsibility, intimacy, establishment of own aspiration, generativity, awareness on social role, and openness. The two intermediate variables were clarity of self-image, and empowerment. The participants of this research were one hundred and forty male workers in their early 30s who are employees of a Japanese company. Career adaptability was found to be explainable by some behavioral and attitudinal variables. Major findings are as follows:(1) Openness was the most influential variable on career adaptability.(2) Clarity of self-image, empowerment, and awareness of own responsibility were influential variables on career adaptability.(3) Such variables as establishment of own aspiration, intimacy, and awareness on social role have indirect effects on career adaptability through clarity of self-image and/or empowerment.