The present study analyzes not only the language used in the three novels of Mahfouz's Cairo Trilogy, but also the manifestations of the various attitudinal meanings. It presents a linguistic analysis based on Appraisal theory which was developed by Martin and White (2005), and rooted from Halliday's Systemic Functional Linguistics (SFL) (2014). The main objective of the study is to investigate the linguistic manifestations of the Attitude system of the Appraisal theory, which provides three types of attitudes; that is, affect, judgement, and appreciation. This approach highlights the interpersonal meanings conveyed by not only the author, but also the narrator of the selected novels. It also focuses on their feelings and attitudes about Egyptian women as depicted in the texts. A mixed quantitative and qualitative method is employed for the analysis. The three categories of the Attitude system, which are realized by means of a number lexical items, are manually annotated and investigated by using a software programme; that is, UAM (2023) which helps identify the different types of attitudes which are frequently used and distributed in the texts. Results show that the three kinds of attitudes were distributed with varying frequencies. Positive, rather than negative attitudes, are used by the author, which leads to a better understanding of the different meanings created in the selected texts.