To correctly grasp the balance of a construction work by recognizing, as an element of an individual cost, a fee paid by a local company, which is included in an amount paid for the construction work.SOLUTION: A construction cost management device includes a storage unit 106 and a control unit 102. The storage unit 106 stores a cost element master 106d storing elements of individual costs and account items of the costs in association with each other. The control unit 102 includes: a sales processing unit 102a that records sales of a construction work and charges a construction fee to an orderer; a deposit processing unit 102b that sets a difference between a deposit amount made by the orderer and the charged amount as an adjustment amount; a deposit deletion unit 102c that specifies a construction corresponding to the adjustment amount when a deposit deletion amount which is the deposit amount added with the adjustment amount is deleted from the charged amount; and a cost calculation unit 102d that creates a construction cost specification based on the adjustment amount specified at the time of deposit deletion and the cost elements in the cost element master 106d, and calculates the cost.SELECTED DRAWING: Figure 1
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