Disclosed is a spuit for cleaning a fishbowl, wherein a piston member (300) is inserted into a spuit body (100). According to the present invention, in a spuit for cleaning a fishbowl, a sealing member (500) and an air passage opening and closing member (600) are inserted into a piston body (400) on which slits are formed in a lengthwise direction. By a space between the air passage opening and closing member (600) and an inner wall of a cylinder-type body unit (120), a space between the air passage opening and closing member (600) and the sealing member (500), and slits (450) existing in first and second piston areas (420, 430), an air passage which communicates an internal space (800) of the spuit with the outside of the spuit is formed, and the sealing member (500) and the air passage opening and closing member (600) come in contact with each other such that an air passage is closed by removing the space between the sealing member (500) and the air passage opening and closing member (600). Further, according to the present invention, a spuit for cleaning a fishbowl performs a step of sucking foreign substances within the fishbowl by an automatic backward movement of a piston, and prevents the sucked foreign substances from being discharged again into the fishbowl when a forward-moving step of the piston is performed by a person, thereby consecutively performing the suction of the foreign substances within the fishbowl by repeating said steps in a successive manner whereby convenience of use is provided.La présente invention a trait à une seringue permettant de nettoyer un bocal à poissons, où un élément de piston (300) est inséré dans un corps de seringue (100). Selon la présente invention, dans une seringue permettant de nettoyer un bocal à poissons, un élément détanchéité (500) et un élément douverture et de fermeture de passage dair (600) sont insérés dans un corps de piston (400) sur lequel des fentes sont formées dans le sens de la longueur. Grâce à un espac
