The invention is to provide a medicine packaging apparatus, a determination method of remaining medicine packaging sheet, and a medicine packing sheet roll that can determine the remaining amount of medicine packaging sheet accurately.The apparatus includes: a roll supporting unit 2 to be mounted to core tube 201 of a medicine packaging sheet roll 200 a sensor 24a, which is provided on the roll supporting unit 2, and outputs a count value corresponding to the rotation amount, a wireless reader-writer 26, which having an antenna 25 on the roll supporting unit 2, by using the antenna 25 the information is written into the core tube IC tag provided in the core tube 202, and the written information is read sheet remaining amount estimation unit 57, which is estimating the remaining amount of sheet based on the information of the above information and the size of the core tube and a controller 5 for selectively the processing of the case which has already been written and the processing when the reference time count value has not yet written to.本發明提供一種可正確判斷藥劑分包紙之紙剩餘量之藥劑分包裝置、藥劑分包紙剩餘量判斷方法及藥劑分包紙卷。具備:卷支承部2,其安裝有藥劑分包紙卷200之芯管201;感測器24a,其設于上述卷支承部2,並輸出與旋轉量對應之計數值;無線讀寫器26,其在上述卷支承部2上具有天線25,使用該天線25向設于上述芯管201之芯管IC標籤202寫入資訊,並且讀取寫入之資訊;資訊生成部57a,其生成寫入上述芯管IC標籤202之資訊;紙剩餘量推定部57,其基於上述資訊及上述芯管201之尺寸資訊推定當前紙剩餘量;及控制器5,其選擇性地進行在上述芯管IC標籤202尚未寫入上述基準時間點計數值之情形下之處理與已經寫入上述基準時間點計數值之情形下之處理。10‧‧‧顯示部2‧‧‧卷支承部24a‧‧‧光感測器25‧‧‧天線26‧‧‧無線讀寫器(資訊讀寫部、通信部)29‧‧‧佈線5‧‧‧控制器(控制部)55‧‧‧記憶體57‧‧‧紙剩餘量判斷部(紙剩餘量推定部、紙剩餘量運算部)57a‧‧‧資訊生成部200‧‧‧藥劑分包紙卷201‧‧‧芯管202‧‧‧芯管IC標籤(記錄媒介)
