Marketing ethic involves standards and principles that outline acceptable conduct in the marketplace. Marketing usually occurs in the context of an organization, and unethical activities usually develop from the pressure to meet organizational performance objectives. Some obvious ethical issues in marketing practices involve clear-cut attempts to use deceptive measure to take advantage of the customers. The problem envisaged in the study revolves around the deceptive practices in line with four Ps Product, Price, Place and Promotion) of Marketing mix. These variables are being manipulated in an unethical means in order to make profit without actually satisfying the consumers’ need which is the major goal of marketing. Despite the outcry of consumers against these unethical practices that revolves around the four Ps of marketing (product, price, place and promotion) most firms have done little or nothing at all from their own end to tackle this problems. Yet on daily basis, consumers are being defrauded with inadequate inform about the various marketing offering notwithstanding the strong measures by the government and its agencies to control these unethical practices in Nigeria. And it is against this problem that the interest for this study aroused. The overall objective of this study was to examine theoretically, the influence of unethical marketing practices on marketing mix in Nigeria. Specifically, the study will set out to; explore the concept of unethical practices in relation to the marketing mix and determine the ethical best practices as it concerns the marketing mix element. Conceptual framework was constituted, various empirical and theoretical literatures were reviewed and contribution was made. The study concludes that despite the various measures by the government and companies to maintain ethical standards in marketing practices in Nigeria, some marketers are still carrying out so many unethical practices (such as, price fixing, Price collusion, False product information, Product with high degree of risk, deceptive pricing and advertising, advertising to children, etc.), thereby taking advantage of the ignorant customers. This does not concur with the major goal of marketing which revolves around satisfying consumer needs at a profit. Recommendations and suggestions/limitations of the study were given.