近年來，國內外均出現下游流通業者以其優勢市場地位，與商品供應商發生交易關係之衝突事件，引發不公平競爭之相關討論。因此，本文探究的是大型流通業者在掌握一定通路權力下，是否濫用其優勢市場地位，而對中小型製造商所可能造成的不公平競爭行為，透過深度訪談與供應商問卷調查，了解交易雙方對交易限制之觀點，結合國內實際發生案例之分析，釐清大型流通業垂直交易限制對不公平競爭之影響。 本文結果指出：(一) 附加費用的問題以及要求獨賣，是供應商最關注的議題；(二) 不同流通業態可能發生違反公平交易法的垂直交易限制類型不同，並以價格的交易限制最普遍；(三) 公平法除以第19條第一項為單一原則外，應考量企業規模、類型、行銷規劃等因素，分析垂直交易限制之合理性。

Considerable discussion pertaining to unfair competition has recently been triggered by down stream distributors taking advantage of their dominant market position to conduct unfair trade practices with those who supply merchandise. Therefore, this research focuses on whether large distributors with certain channel rights are abusing their dominant market position and possibly imposing unfair competition practices on small suppliers. In making use of interviews and supplier questionnaires, we gain a full understanding of the impact of large distributors’ vertical restraints on unfair competition. Most suppliers are concerned about the problem of surcharges and exclusive dealing arrangements. The types of vertical restraints, however, do vary with different distributors, but the most common one concerns price. The results show that the Fair Trade Commission should consider multiple principles, such as the scale and type of an enterprise, and its marketing strategy etc. rather than merely the threshold of market share.