An input support apparatus of an embodiment includes a template storage unit configured to store a form template that is a template for form data having one or more slots to which item values are input in correspondence with item names, the form template describing item names of the respective slots and alternatives of an alternative type slot in which an item value is selected from a plurality of alternatives together with respective readings thereof; an acquisition unit configured to acquire recognition result data obtained by speech recognition performed on utterance of a user, the recognition result data containing a transcription and a reading; and a determination unit configured to determine the item values to be input to the slots of the form data based on the reading of the recognition result data and the readings of the item names and the alternatives described in the form template.