Background: Objective: The aim of this case report was to evaluate interferential current (IFC) therapy as adjuvant in treating constipation and abnormal pelvic floor muscle activity in cerebral palsy (CP) children. Study design: Nine CP children aged between 4,5 to 13 years old who had constipation according to ROME IV criteria received pre post test examination. At the baseline we collected data regarding the Pediatric Incontinence and Constipation Score (PICS), Pediatric Quality of Life (PedsQL), and pelvic floor muscle activity at rest and during contraction. They received standard lactulose therapy and IFC therapy with a frequency of 4000-4100 Hz, duration 20 minutes, 3 times a week for 4 weeks. A week after the last IFC series, the parameters were re-evaluated to assess outcomes. Data were analyzed with SPSS v20.0. Results: PICS for constipation improved (P= 0,005), PedsQL improved at pain parameter (p = 0,008), and the pelvic floor muscle activity reduced significantly at rest (P= 0,036) in CP with constipation after received additional IFC therapy.