SECURITIES AND EXCHANGE COMMISSION
           Washington, D.C.  20549
                    FORM 8-K
           CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange
Act of 1934

Date of Report (date of earliest event reported): May 20, 2003

BANC ONE HELOC TRUST 1999-1
   (Exact name of registrant as specified in its charter)

 United States     333-59845-01     36-7282500
 (State or Other 	(Commission File	(I.R.S Employer
Jurisdiction of  	 Number)		Identification
Incorporation					Number)

c/o Bank One, National Association
Corporate Trust Services Division - 1 N. State Street,
9th Floor
Chicago IL
(Address of Principal Executive Offices)

60670
(Zip Code)

Registrant's telephone number, including area code:		312-336-9730

Item 5.	Other Events
On behalf of Banc One HELOC Trust 1999-1, a Trust created pursuant to the
Pooling Agreement, dated May 31, 1999, the Paying Agent has caused to
be filed with the Commission, the Monthly Report dated May 20, 2003.
The Monthly Report is filed pursuant to and in accordance with (1) numerous
no-action letters (2) current Commission policy in the area.  The filing of the
Monthly Report will occur subsequent to each monthly distribution to the
holders of the Trust's Investor Certificates.

A.	Monthly Report Information: Aggregate distribution information
	for the current distribution date May 20, 2003.
		 Principal		   Interest	       Ending Balance
Cede & Co.	$4,325,704.78	$ 199,041.23	$166,198,194.89




B.	No delinquency in payment under the Transferor Certificate, or
	the MBIA Insurance Policy has occurred.

C.	Have any deficiencies occurred?  NO. Date: Amount:

D.	Were any amounts paid or are any amounts payable under the
	MBIA Insurance Policy?  NO Amount:

E.	Are there any developments with respect to the MBIA Insurance
	Policy?  NONE.

F.	Item 1:  Legal Proceedings:  NONE

G.	Item 2:  Changes in Securities:  NONE

H.	Item 4:  Submission of Matters to a Vote of Security Holders:  NONE

I.	Item 5:  Other Information - Items 1, 2, 4, 5 if applicable:  NOT
	APPLICABLE

Item 7.	Monthly Statements and Exhibits
Exhibit No. 1.   Monthly Statement to Certificate holders dated
May 20, 2003

Statement to Certificateholders (Page 1 of 2)
Distribution Date: 5/20/03
INVESTOR CERTIFICATES DISTRIBUTION SUMMARY
(PER $1000 ORIGINAL PRINCIPAL AMOUNT)
A. INTEREST & PRINCIPAL DISTRIBUTIONS TO INVESTORS
Investor Certificate Interest Distributed 0.398082
Investor Certificate Interest Shortfall Distributed 0.000000
Remaining Unpaid Investor Certificate Interest Shortfall 0.000000
Managed Amortization Period ? (Yes=1; No=0) 1
Investors Certificate Principal Distributed 8.651410
Principal Distribution Amount 8.883494
Maximum Principal Payment 17.600385
Alternative Principal Payment 8.883494
Principal Collections less Additional Balances 8.883494
Investor Loss Amount Distributed to Investors 0.058531
Accelerated Principal Distribution Amount -0.290616
Credit Enhancement Draw Amount 0.00
Total Amount Distributed to Certificateholders (P & I) 9.049492
B. INVESTOR CERTIFICATE PRINCIPAL BALANCE
Beginning Investor Certificate Balance 155,460,411.08
Ending Investor Certificate Balance 151,134,706.29
Beginning Invested Amount 160,682,595.43
Ending Invested Amount 156,211,582.73
Investor Certificateholder Floating Allocation Percentage 94.1476%
Pool Factor 0.3022694
Liquidation Loss Amount for Liquidated Loans 31,084.71
Unreimbursed Liquidation Loss Amount 0.00
C. POOL INFORMATION
Beginning Pool Balance 170,671,026.80
Ending Pool Balance 166,198,194.89
Servicing Fee 71,112.93
D. INVESTOR CERTIFICATE RATE
Investor Certificate Rate 1.589380%
LIBOR Rate 1.329380%
Maximum Rate 4.423029%
E. DELINQUENCY & REO STATUS
Delinquent 30-59 days
No. of Accounts 73
Trust Balances 2,204,269.42
Delinquent 60-89 days
No. of Accounts 29
Trust Balances 712,778.62
Delinquent 90+ days
No. of Accounts 100
Trust Balances 3,984,790.54
Delinquent 9+ Months
No. of Accounts 0
Trust Balances 0
REO
No. of Accounts 0
Trust Balances 0.00

IN WITNESS WHEREOF, the undersigned has caused this Certificate
to be duly executed and certifies to the best of his knowledge and
belief that information is true and correct this 15th day of May 2003
		       Bank One, N.A.
		       as Servicer

			/s/ Michael J. Grubb
		       _______________________________________

			 Michael J. Grubb
		       First Vice President

	Distribution List:

	"   Keith Richardson - Bank One, N.A."



SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

BANC ONE HELOC TRUST 1999-1

By:	/s/ Michael J. Grubb
Name:	Michael J. Grubb
Dated May 20, 2003