The present invention relates to an excreta detecting sensor for detecting excrement/urine from people who are unable to control their own urination, such as elderly individuals, disabled individuals, patients and infants, and relates to an excreta detecting apparatus which automatically notifies a carer of the urination. The excreta detecting sensor according to the present invention includes a conductive fiber having elasticity and absorbent polymer having the characteristic of expanding upon absorbing moisture such as moisture absorbent used in diaper. The excreta detecting apparatus according to the present invention wirelessly notifies the user of the excreta detection information resulting from the defecation or the urination from diaper in which the excreta detecting sensor is mounted.
