Aim: To investigate the relation between forced expiratory volume at first second and peak expiratory flow with gross motor function level in the children with cerebral palsy.

Methods and Procedures: Thirty children with cerebral palsy from both sexes were included in this study. The children ages ranged from 3 to 11 years old.

Methods and Procedures: Thirty children with cerebral palsy from both sexes were included in this study. The children ages ranged from 3 to 11 years old. Children were evaluated using spirometer to assess forced expiratory volume at first second and peak expiratory flow and gross motor function classification system to assess the functional level.

Inclusion Criteria:

• Children with cerebral palsy
• age was from 3 to 11years old
• They were able to sit independently and to follow instructions.
• Children who can blow air independently.

Exclusion Criteria:

• Uncontrolled convulsions
• Any psychiatric disorders

• Children with cerebral palsy
• age was from 3 to 11years old
• They were able to sit independently and to follow instructions
• Children who can blow air independently.