美國於過去30至40年來，女性勞動參與率大幅增加，然而女性照顧小孩的時間卻仍呈現增長的趨勢；若以男性來看，也可發現照顧小孩的時間呈現穩定成長。為了探討此現象，我們進而搜集父母照顧小孩的相關資料，發現父母照顧小孩時間與教育程度的報酬率有關，故想研究父母照顧小孩時間與一個地區產業結構之相關性。在本文中，我們針對一個地區的勞力密集程度與父母教育小孩時間進行分析，而著重於體力的探討是因為本文假設從事體力密集的工作者較不具區域遷徙性，進而討論此特性對於父母照顧小孩的時間影響為何。 本研究的貢獻，在於以美國的州別為單位，利用不同職業所使用的勞力程度與其在各州分佈的比例，形成州與州之間產業結構的差異，並深入分析此差異對於父母照顧小孩時間的影響。由實證結果可發現，勞力密集程度與父母照顧小孩時間呈現負相關，且對於不同性別小孩的照顧時間並無顯著差異，表示父母對於不同性別小孩的重視程度相當。此外，教育程度不同的父母親，照顧小孩時間的差異性不大，表示產業結構的差異為全面性的影響，不因父母教育程度的不同而有所改變。最後，父母減少照顧小孩的時間主要來自於教育及接送時間，且對於0至11歲的小孩影響最大，表示勞力密集程度越高，使得父母對於小孩的人力資本投資自幼較不那麼重視。 / In the United States, women’s labor force participation rapidly rises over the past several decades; however, the amount of time women spent with children increases as well. On the other hand, man’s time with children has the same trend as women. For finding potential explanations of parents’ childcare time increased, we collect related literatures on this issue. It reveals that increasing time may be a response to a return on parents’ education. Here, we claim the strong correlation between the childcare time and industrial structure. We take physical factors to define industrial structure in that we assume labor-intensive workers are less mobile across regions. We discuss this assumption would impact on the parents’ childcare time. We estimate difference in industrial structure between states in America and discuss this effect on parents’ childcare time. By several empirical results, we summarize that (a) there is a negative relationship between labor-intensive levels and childcare time, (b) the sex of children and parents’ education degree would not affect empirical results, (c) decreasing childcare time of parents comes from educational time and travel time, and (d) the drop in childcare time was particularly pronounced among those children ranges from 0 to 11. This conclusion implies that parents neglect human capital development of children.