Toaru Majutsu no Index Wiki
Cleaning robots

Cleaning robots, cleaning the streets of Academy City one can at a time.

A Cleaning Robot (掃除ロボ Sōji Robo?) is an automated cylindrical machine designed to clean the grounds of Academy City. It can be described as a mobile trashbin.

It can be found all over and only in Academy City. Like the Security robot, it is cylindrical in shape, and with it, it is one of the most noticeable features of the scientific advancement of the city. The cleaning robot is prominently used by Tsuchimikado Maika, who can often be found riding on top of one and controlling it.


It is cylindrical in appearance and is designed specifically to look like a metal container with rollers underneath for mobility. It has a small rectangular opening on its front for purposes unknown (probably for its camera and other input devices) and has exhaust vents on its back, which it uses for its small vacuum capability. Unlike the Security Robot, it is colored beige.

Other than the circular mop underneath, it has no other defining features, making it look relatively inconspicuous if standing still.

Unlike the security robots, it is rarely seen operating in small groups. Only five were deployed to A Certain High School men's dormitory.[1]

The cylinder is 80 cm in length and 40 cm in diameter.[2] The inside of cleaning robot is almost entirely hollow, providing enough space for a small child to fit while curled up.[3]



Toaru Kagaku no Railgun E17 15m 11s

Index on top of a cleaning robot.

Like the Security robot, the cleaning robot uses rollers underneath its body to move around. It has been shown to move around obstacles with ease, as it has a camera installed on it.[4]

It is implied that the cleaning robot has similar features to that of the Security robot, such as climbing over difficult terrain and operate elevators using infrared signals.[Notes 1]

The machine can also tilt slightly backwards, when trying to "consume" rubbish.[5]


Its main task is to clean the grounds of Academy City, though several can also be assigned to dormitories.[1] It has mops underneath it; to presumably brush the ground underneath it. More importantly, it is shown having the ability to suck rubbish to draw it in closer to it, so it would be easier to "consume" it, which it presumably stores in a receptacle inside of its body.[5]

It has also been shown to be quite relentless when cleaning, as shown when several cleaning robots in Kamijou Touma's dormitory building were trying to clean Index's blood after she was cut down by Kanzaki Kaori.[1]


  1. There are five Cleaning robots that operate in Kamijou Touma's dormitory, which would imply that it would at least know how to operate an elevator or move on a flight of stairs.



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Academy City
Inhabitants Faculty and Staff Students
Factions and Organizations Board of Directors (Board Chairman) • JudgmentAnti-SkillCooperative InstitutionsUseful SpiderSkill-Out
Locations School Districts School District 1 (Administration) • School District 2 (Military & Law Enforcement Training) • School District 3 (Outsider Accommodation) • School District 4 (Food) • School District 5 (Universities and junior colleges) • School District 6 (Recreation) • School District 7 (Middle & High Schools, Student Accommodations, Hospitals) • School District 8 (Faculty Accommodation) • School District 9 (Industrial and fine arts) • School District 10 (Reformatory, Nuclear Research, Cemetery) • School District 11 (Goods transfer) • School District 12 (Theology) • School District 13 (Kindergarten and primary schools) • School District 14 (Overseas Students) • School District 15 (Shopping & Mass Communication) • School District 16 (Commerce) • School District 17 (Industry) • School District 18School District 19School District 20 (Sports and athletics) • School District 21 (Water storage & Observatory) • School District 22 (Underground development) • School District 23 (Aerospace)
Other Notable Locations School District 7: Windowless BuildingHeaven Canceller's HospitalA Certain High SchoolKamijou ResidenceSchool Garden (Tokiwadai Middle School)
Other: Imaginary Number DistrictReformatoryExternal Connection Terminals
Power Curriculum Program Esper (Level 0Level 1Level 2Level 3Level 4Level 5Level 6 (SYSTEM)) • Personal RealityEsper AbilitiesAIMSystem ScanLevel 6 ExperimentsParameter List
Notable Technology Tree DiagramHikoboshi IIBankAirshipCleaning RobotSecurity RobotWind TurbinePowered SuitNanodeviceSupersonic Passenger PlaneHard Science
Events (Timeline) Regular DaihaseisaiIndependence DayIchihanaransaiSummer City Flood Prevention ProgramAnti-Crime Orientation
Other 0930 IncidentInterceptor ShowAvignon Cleanup OperationWorld War IIIDecember Heatwave48 Hours to Restore OrderEvacuation of Academy CityOperation Handcuffs
Other ScienceExperiments and ProjectsChild ErrorMagic-Science TreatyAcademy City Military
See also: Dark Side of Academy City