健康是人類永恒的主題。隨著人們經濟條件和生活品質的提高，更加意識到保健養生的重要，旅遊兼醫療概念，並考量高齡人口養生、病患者無法進行，以及工作壓力症候群待治癒等需求的保健旅遊(Health Tourism)，近年間則以多元形式出現。雖然各國發展健康旅遊的策略與訴求各不相同，有些強調醫療技術與服務，有些強調身心靈。近年來保健旅遊已成為一股新潮流。在本篇文章中，本研究利用Grossman(1972)的模型，來說明消費者從事保健旅遊的動機和行為。對於保健旅遊的消費者行為的研究，是基於經濟學的理論，視消費者為理性決策者，認為其在購買產品或服務時，總是追求利益極大化。本研究為了說明消費者在進行保健旅遊時，對於保健旅遊真正的目的在於增加「健康」的這個結果具有不確定性，在消費者進行每一次保健旅遊時，引進知識函數，做為保健旅遊的解釋變數之一，表示代表性消費者當時對於此保健旅遊結果的了解程度。有了這項設定，所得出來的消費者最適（行為），將具有知識基礎，並且表示模型中的消費者在做決策時，仍然是理性的，而非有限理性，只是消費者的訊息有可能是不完全的。在最適健康資本的供需比較靜態分析上，得知工資的增加，會造成保健旅遊投資活動的增加，表示保健旅遊投資活動是個正常財。而利率的上升或是保健旅遊投資活動的上一期價格提高，都將造成保健旅遊投資活動的減少。至於健康資本折舊率提高，對消費者保健旅遊投資的均衡水準影響是上升還是下降，則視健康資本的需求彈性而定。

Health is permanent subject for people. As incomes and the standard of living grow up, people realize more the importance of health care. Tourism with health care (Health Tourism) now catches on well, including the old preserving health, the patient not traveling to a distant place, and the worker easing off his pressure. Countries may adopt different strategies for health tourism. Some focus on good technology and service, others on care through body, mind and spirit. In this paper, by using framework of Grossman (19772), we want to set up a health-tourism model to explain the motives and behaviors of consumers, engaged in health tourism. Our study is based on economic theory and views consumers as rational decision makers, which means they always maximize their utilities. In order to explain the fact that consumer is uncertain about the outcome of health tourism, the original motive of this health tourism, we bring in the model "knowledge function" as one factor of his health-tourism investment. Knowledge function represents the consumer's understanding of the health tourism at that time. With this knowledge function, the optimal behavior solution of our health-tourism-consumption model will have epistemic foundation. This signifies that the representative consumer in our model is still rational, not the person of bounded rationality, although his information may be incomplete. In the comparative analysis, we know that the rises in wage level will increase the number of journeys in health tourism, which means health tourism is a normal good. The rise of interest rate or the last period price of health tourism will decrease the number of journeys in health tourism. As for the rise in the depreciation rate of the health capital, whether it increases or decrease the number of journeys in health tourism will depend on the elasticity of health demand.