Recent years have witnessed the increasing adoption of artificial intelligence (AI) applications in business, which have been found to improve work efficiency and decision-making processes across different business functions. However, ethical concerns, such as issues privacy concerns, misinformation, and job insecurity, appear amid this transformation in the contemporary workplace. Hence, both academicians and practitioners have appeared to expand the understanding of human-AI collaboration from the lens of ethics. Responding to this appeal, this chapter explores the ethical implications of human-AI collaboration in the workplace based on normative ethical theories, which include egoism, utilitarianism, ethics of duty, rights, and justice. By examining the ethical dimensions of human-AI collaboration, this chapter provides both the theoretical implications for future ethical studies on human-AI collaboration and the guidelines for organizational practice to eliminate the ethical concerns when integrating human-AI collaboration into their daily operations.