current research is considered the first investigation of parasitic infections with the dwarf tapeworm (Hymenolepis nana), which was conducted in the city of Samawah/Muthanna province. It is clear from the current results that children (males and females) are most susceptible to infection with these worms. 170 samples were collected and it was found that the number of samples infected with the worm was 20, with an overall prevalence rate of (11.76%) (males 11, 55%; females 9 , 45%). There are no statistically significant differences between infected males and females. The parasite infects ages between (5-16) years, the hig hest, prevalence rate was recorded in age group, (9-12)was (44.12%, 45%), while the lowest percentage was recorded in the age group (5-8) was (23.53% , 20%). There, was a signifi cant difference between the rate of infection with this parasite between the first age group and the two age groups (second and third). no statistically signif icant differences stuck between the second and third age groups. Most of the affected patients suffered from loss of appetite, insomnia, persistent vomiting and anal itching. The current study recorded the highest prevalence of tapeworm infection based on contact with animals (60%) compared to with non-contact with animals (40%), and these differences are significant at (P≤ 0.05. ). The drug praziquantel is considered a successful treatment for this worm.