A vehicular acceleration suppression device for suppressing acceleration of a vehicle which depends on a manipulation amount of a drive force instruction manipulation element manipulated by a driver to instruct a drive force to control suppression of the drive force, the vehicular acceleration suppression device comprising: a drive force manipulation amount detection unit (10G, 24) configured to detect a drive force manipulation amount which is the manipulation amount of the drive force instruction manipulation element; an acceleration control unit (10J, 10K) configured to control the acceleration of the vehicle depending on the drive force manipulation amount detected by the drive force manipulation amount detection unit (10G, 24); a vehicle speed detection unit (10B, 16) configured to detect a vehicle speed of the vehicle; the vehicular acceleration suppression device being characterized by a surrounding environment recognition unit configured to generate an image of surroundings of the vehicle based on an image captured by a camera provided on the vehicle; a parking frame certainty degree calculation unit configured to recognize a parking frame included in the image of the surroundings of the vehicle which has been generated by the surrounding environment recognition unit to calculate a parking frame certainty degree indicative of a degree of certainty about a presence of a parking frame in a travel direction of the vehicle based on the parking frame which has been recognized; and an acceleration suppression unit (10J, 10K, 42, 44) configured to suppress the acceleration controlled by the acceleration control unit (10J, 10K) based on the parking frame certainty degree calculated by the parking frame certainty degree calculation unit and the vehicle speed detected by the vehicle speed detection unit (10B, 16), wherein the acceleration suppression unit (10J, 10K, 42, 44) is configured to set a suppression degree of the acceleration to be lower in a case where the vehicle speed is high than in a case the vehicle speed is low. a drive force manipulation amount detection unit (10G, 24) configured to detect a drive force manipulation amount which is the manipulation amount of the drive force instruction manipulation element; an acceleration control unit (10J, 10K) configured to control the acceleration of the vehicle depending on the drive force manipulation amount detected by the drive force manipulation amount detection unit (10G, 24); a vehicle speed detection unit (10B, 16) configured to detect a vehicle speed of the vehicle; the vehicular acceleration suppression device being characterized by a surrounding environment recognition unit configured to generate an image of surroundings of the vehicle based on an image captured by a camera provided on the vehicle; a parking frame certainty degree calculation unit configured to recognize a parking frame included in the image of the surroundings of the vehicle which has been generated by the surrounding environment recognition unit to calculate a parking frame certainty degree indicative of a degree of certainty about a presence of a parking frame in a travel direction of the vehicle based on the parking frame which has been recognized; and an acceleration suppression unit (10J, 10K, 42, 44) configured to suppress the acceleration controlled by the acceleration control unit (10J, 10K) based on the parking frame certainty degree calculated by the parking frame certainty degree calculation unit and the vehicle speed detected by the vehicle speed detection unit (10B, 16), wherein the acceleration suppression unit (10J, 10K, 42, 44) is configured to set a suppression degree of the acceleration to be lower in a case where the vehicle speed is high than in a case the vehicle speed is low.