Background: Choking is an emergency condition that requires immediate treatment. Choking occurs in 80% of under five-years-old children worldwide. Many children do not receive help since the aid provider fears causing harm due to the absence of choking case knowledge. Improving mothers' awareness can decrease choking risk in children that threatens life. Aim: This study aimed to assess mothers' awareness regarding first aid of choking among their children under five years. Design: A descriptive research design was used to conduct this study. Setting: This study was carried out at the pediatric outpatient clinics affiliated to Fayoum General Hospital. Sample: A convenience sample of 110 mothers had children under five years participated in the study admitted to the previous mentioned setting. Tools of the study: three tools were used to conduct this study 1st tool: a structured interview questionnaire sheet was used to assess mothers' knowledge regarding first aid of choking. 2nd tool: Observation checklist to assess mothers' reported practice regarding first aid of choking. 3rd tool: Likert scale to assess mothers’ attitude regarding first aid of choking. Results: study clarified that mean age of studied mothers was 33.24 year; also revealed that majority of them had not taken previous first aid training and 25.5% had previous incident history. This study showed that 34.5% of mothers had satisfactory knowledge regarding first aid of choking. Conclusion: The present study concluded that two third of studied mothers had unsatisfactory knowledge regarding choking first aid. Meanwhile more than two third of them had incomplete practice regarding choking first aid. Also, this study showed that 64.5% of studied mothers had positive attitude regarding first aid of choking. There was statistically significant positive correlation between total knowledge score, total practice and total attitude. Recommendations: Constantly educational training program for mothers to enhance and improve their awareness regarding choking first aid.